diff --git a/src/slic3r/CMakeLists.txt b/src/slic3r/CMakeLists.txt
index 969dcb693a..71d1c3eba0 100644
--- a/src/slic3r/CMakeLists.txt
+++ b/src/slic3r/CMakeLists.txt
@@ -494,6 +494,8 @@ set(SLIC3R_GUI_SOURCES
     GUI/Widgets/AMSControl.hpp
     GUI/Widgets/AMSItem.cpp
     GUI/Widgets/AMSItem.hpp
+    GUI/Widgets/MultiNozzleSync.cpp
+    GUI/Widgets/MultiNozzleSync.hpp
     GUI/Widgets/AxisCtrlButton.cpp
     GUI/Widgets/AxisCtrlButton.hpp
     GUI/SafetyOptionsDialog.hpp
diff --git a/src/slic3r/GUI/3DScene.cpp b/src/slic3r/GUI/3DScene.cpp
index ec7deeb82a..84709dd13b 100644
--- a/src/slic3r/GUI/3DScene.cpp
+++ b/src/slic3r/GUI/3DScene.cpp
@@ -1024,7 +1024,8 @@ void GLVolumeCollection::render(GLVolumeCollection::ERenderType       type,
                                 const Transform3d&                    projection_matrix,
                                 const GUI::Size&                      cnv_size,
                                 std::function<bool(const GLVolume &)> filter_func,
-                                bool                                  partly_inside_enable) const
+                                bool                                  partly_inside_enable,
+                                std::vector<double> *                 printable_heights) const
 {
     GLVolumeWithIdAndZList to_render = volumes_to_render(volumes, type, view_matrix, filter_func);
     if (to_render.empty())
@@ -1108,7 +1109,24 @@ void GLVolumeCollection::render(GLVolumeCollection::ERenderType       type,
             //use -1 ad a invalid type
             shader->set_uniform("print_volume.type", -1);
         }
-  
+
+        // Per-extruder printable-height shading. The flag is set to
+        // 2.0 only for multi-extruder printers (two per-extruder heights); otherwise it is forced to 0.0
+        // on every render so no stale flag survives a multi->single-extruder plate switch, keeping the
+        // shared gouraud shader pixel-identical for single-extruder printers. When active the height
+        // branch reads print_volume.xy_data (the bed rect), so set it explicitly here.
+        std::array<float, 3> extruder_printable_heights = {0.0f, 0.0f, 0.0f};
+        if (printable_heights != nullptr && printable_heights->size() > 1) {
+            extruder_printable_heights[0] = 2.0f;
+            extruder_printable_heights[1] = static_cast<float>((*printable_heights)[0]);
+            extruder_printable_heights[2] = static_cast<float>((*printable_heights)[1]);
+            shader->set_uniform("extruder_printable_heights", extruder_printable_heights);
+            shader->set_uniform("print_volume.xy_data", m_print_volume.data);
+        }
+        else {
+            shader->set_uniform("extruder_printable_heights", extruder_printable_heights);
+        }
+
         shader->set_uniform("volume_world_matrix", volume.first->world_matrix());
         shader->set_uniform("slope.actived", m_slope.isGlobalActive && !volume.first->is_modifier && !volume.first->is_wipe_tower);
         shader->set_uniform("slope.volume_world_normal_matrix", static_cast<Matrix3f>(volume.first->world_matrix().matrix().block(0, 0, 3, 3).inverse().transpose().cast<float>()));
diff --git a/src/slic3r/GUI/3DScene.hpp b/src/slic3r/GUI/3DScene.hpp
index 76d10620d9..1217d32182 100644
--- a/src/slic3r/GUI/3DScene.hpp
+++ b/src/slic3r/GUI/3DScene.hpp
@@ -497,7 +497,10 @@ public:
                 const Transform3d&                    projection_matrix,
                 const GUI::Size&                      cnv_size,
                 std::function<bool(const GLVolume &)> filter_func   = std::function<bool(const GLVolume &)>(),
-                bool                                  partly_inside_enable =true
+                bool                                  partly_inside_enable =true,
+                // Per-extruder printable heights (extruder_printable_height); null / size<=1
+                // leaves the shader's extruder_printable_heights flag at 0.0 (single-extruder = inert).
+                std::vector<double> *                 printable_heights = nullptr
            ) const;
 
     // Clear the geometry
diff --git a/src/slic3r/GUI/AMSMaterialsSetting.cpp b/src/slic3r/GUI/AMSMaterialsSetting.cpp
index 4a429a4a5a..f92114b53d 100644
--- a/src/slic3r/GUI/AMSMaterialsSetting.cpp
+++ b/src/slic3r/GUI/AMSMaterialsSetting.cpp
@@ -16,6 +16,9 @@
 #include "DeviceCore/DevExtruderSystem.h"
 #include "DeviceCore/DevFilaBlackList.h"
 #include "DeviceCore/DevFilaSystem.h"
+#include "DeviceCore/DevFilaSwitch.h"
+#include "DeviceCore/DevNozzleSystem.h" // DevNozzle / GetNozzleByPosId / GetNozzleRack
+#include "DeviceCore/DevNozzleRack.h"   // DevNozzleRack::IsSupported (rack gating)
 
 #define FILAMENT_MAX_TEMP       300
 #define FILAMENT_MIN_TEMP       120
@@ -531,56 +534,121 @@ void AMSMaterialsSetting::on_select_reset(wxCommandEvent& event) {
     Close();
 }
 
+// Nozzle-context builder for the AMS-edit blacklist check. Factors the blacklist evaluation out of
+// on_select_ok and threads rack-gated per-nozzle context (extruder id + nozzle flow + nozzle diameter)
+// into CheckFilamentInfo, returning the accumulate-all CheckResult. As a side effect it resolves
+// ams_filament_id/ams_setting_id from the matched preset. fila_name is kept as the preset name (not
+// the short alias) so the name / name_suffix rules match on the non-rack fleet (no unintended
+// activation of e.g. the PLA Glow rule).
+static DevFilaBlacklist::CheckResult
+sCheckFilamentInfo(PresetBundle*      preset_bundle,
+                   MachineObject*     obj,
+                   int                ams_id,
+                   int                slot_id,
+                   const std::string& filament_id,
+                   std::string&       ams_filament_id,
+                   std::string&       ams_setting_id)
+{
+    DevFilaBlacklist::CheckResult result;
+    if (!preset_bundle || !obj)
+        return result;
+
+    // Orca: there is no lookup struct that also carries setting_id, so resolve the (root) preset by
+    // scanning the filaments collection for a matching filament_id.
+    Preset* fila_preset = nullptr;
+    for (auto it = preset_bundle->filaments.begin(); it != preset_bundle->filaments.end(); ++it) {
+        if (it->filament_id == filament_id) {
+            fila_preset = &(*it);
+            break;
+        }
+    }
+    if (!fila_preset)
+        return result;
+
+    if (wxGetApp().app_config->get("skip_ams_blacklist_check") != "true") {
+        std::string filamnt_type;
+        fila_preset->get_filament_type(filamnt_type);
+
+        DevFilaBlacklist::CheckFilamentInfo check_info;
+        check_info.dev_id              = obj->get_dev_id();
+        check_info.model_id            = obj->printer_type;
+        check_info.fila_id             = fila_preset->filament_id;
+        check_info.fila_type           = filamnt_type;
+        check_info.fila_name           = fila_preset->name;
+        check_info.has_filament_switch = obj->GetFilaSwitch()->IsInstalled();
+        check_info.ams_id              = ams_id;
+        check_info.slot_id             = slot_id;
+
+        if (auto vendor = dynamic_cast<ConfigOptionStrings*>(fila_preset->config.option("filament_vendor"));
+            vendor && !vendor->values.empty()) {
+            check_info.fila_vendor = vendor->values[0];
+        }
+
+        check_info.extruder_id = obj->GetFilaSystem()->GetExtruderIdByAmsId(std::to_string(ams_id));
+
+        // Rack-gated per-nozzle context. For a multi-nozzle main extruder on a rack printer (H2C) the
+        // specific nozzle is resolved later by the print-dispatch rack mapping, so leave
+        // nozzle_flow/nozzle_diameter unset here to keep the high-flow nozzle rules dormant. Every
+        // non-rack printer takes the else branch, threading the reported nozzle flow + diameter and
+        // thereby activating the high-flow blacklist warnings in the AMS-edit dialog for H2D/H2S/X2D/P2S
+        // (and the E3D-kit X1C/P1x).
+        DevNozzleSystem* nozzle_system = obj->GetNozzleSystem();
+        const bool       rack_supported = nozzle_system && nozzle_system->GetNozzleRack() &&
+                                    nozzle_system->GetNozzleRack()->IsSupported();
+        if (check_info.extruder_id == MAIN_EXTRUDER_ID && rack_supported) {
+            ; // multi-nozzle main extruder on a rack printer — nozzle resolved later by print dispatch
+        } else {
+            check_info.nozzle_flow = obj->GetFilaSystem()->GetNozzleFlowStringByAmsId(std::to_string(ams_id));
+            if (nozzle_system) {
+                DevNozzle nozzle = nozzle_system->GetNozzleByPosId(check_info.extruder_id.value_or(-1));
+                if (!nozzle.IsEmpty())
+                    check_info.nozzle_diameter = nozzle.GetNozzleDiameter();
+            }
+        }
+
+        result = DevFilaBlacklist::check_filaments_in_blacklist(check_info);
+    }
+
+    ams_filament_id = fila_preset->filament_id;
+    ams_setting_id  = fila_preset->setting_id;
+    return result;
+}
+
 void AMSMaterialsSetting::on_select_ok(wxCommandEvent &event)
 {
+    if (!obj)
+        return;
+
     //get filament id
     ams_filament_id = "";
     ams_setting_id = "";
 
+    // the combobox item
+    auto filament_item = map_filament_items[m_comboBox_filament->GetValue().ToStdString()];
+
+    // check filament info (rack-gated per-nozzle blacklist evaluation)
     PresetBundle* preset_bundle = wxGetApp().preset_bundle;
-    if (preset_bundle) {
-        for (auto it = preset_bundle->filaments.begin(); it != preset_bundle->filaments.end(); it++) {
+    const auto& fila_check_res = sCheckFilamentInfo(preset_bundle, obj, ams_id, slot_id,
+                                                    filament_item.filament_id, ams_filament_id, ams_setting_id);
 
-            auto filament_item = map_filament_items[m_comboBox_filament->GetValue().ToStdString()];
-            std::string filament_id = filament_item.filament_id;
-            if (it->filament_id.compare(filament_id) == 0) {
+    if (const auto& prohibit_items = fila_check_res.get_items_by_action("prohibition"); !prohibit_items.empty()) {
+        wxString info_msg;
+        for (const auto& item : prohibit_items) { info_msg += item.info_msg + "\n"; }
+        MessageDialog msg_wingow(nullptr, info_msg, _L("Error"), wxICON_WARNING | wxOK);
+        msg_wingow.ShowModal();
+        return;
+    }
 
-
-                //check is it in the filament blacklist
-                if (wxGetApp().app_config->get("skip_ams_blacklist_check") != "true") {
-                    bool in_blacklist = false;
-                    std::string action;
-                    wxString info;
-                    std::string filamnt_type;
-                    std::string filamnt_name;
-                    it->get_filament_type(filamnt_type);
-
-                    auto vendor = dynamic_cast<ConfigOptionStrings *>(it->config.option("filament_vendor"));
-
-                    if (vendor && (vendor->values.size() > 0)) {
-                        std::string vendor_name = vendor->values[0];
-                        DevFilaBlacklist::check_filaments_in_blacklist(obj->printer_type, vendor_name, filamnt_type, it->filament_id, ams_id, slot_id, it->name, in_blacklist, action, info);
-                    }
-
-                    if (in_blacklist) {
-                        if (action == "prohibition") {
-                            MessageDialog msg_wingow(nullptr, info, _L("Error"), wxICON_WARNING | wxOK);
-                            msg_wingow.ShowModal();
-                            //m_comboBox_filament->SetSelection(m_filament_selection);
-                            return;
-                        }
-                        else if (action == "warning") {
-                            MessageDialog msg_wingow(nullptr, info, _L("Warning"), wxICON_INFORMATION | wxOK);
-                            msg_wingow.ShowModal();
-                        }
-                    }
-                }
-
-                ams_filament_id = it->filament_id;
-                ams_setting_id = it->setting_id;
-                break;
-            }
+    if (const auto& warning_items = fila_check_res.get_items_by_action("warning"); !warning_items.empty()) {
+        std::vector<FilamentWarningInfo> infos;
+        for (const auto& item : warning_items) {
+            FilamentWarningInfo winfo;
+            winfo.info_msg = item.info_msg;
+            winfo.wiki_url = item.wiki_url;
+            infos.emplace_back(winfo);
         }
+        FilamentWarningDialog msg_window(nullptr, _L("Warning"), infos);
+        msg_window.ShowModal();
     }
 
     wxString nozzle_temp_min = m_input_nozzle_min->GetTextCtrl()->GetValue();
diff --git a/src/slic3r/GUI/AmsMappingPopup.cpp b/src/slic3r/GUI/AmsMappingPopup.cpp
index cf417498d5..241c2799a7 100644
--- a/src/slic3r/GUI/AmsMappingPopup.cpp
+++ b/src/slic3r/GUI/AmsMappingPopup.cpp
@@ -24,6 +24,9 @@
 #include "BindDialog.hpp"
 
 #include "DeviceCore/DevFilaSystem.h"
+#include "DeviceCore/DevNozzleRack.h"
+#include "DeviceCore/DevMappingNozzle.h"
+#include "DeviceTab/wgtDeviceNozzleSelect.h"
 
 namespace Slic3r { namespace GUI {
 #define MATERIAL_ITEM_SIZE wxSize(FromDIP(65), FromDIP(50))
@@ -64,6 +67,7 @@ static void _add_containers(const AmsMapingPopup *                 win,
     //m_ams_wheel_mitem = ScalableBitmap(this, "ams_wheel", FromDIP(25));
     m_ams_wheel_mitem = ScalableBitmap(this, "ams_wheel_narrow", 25);
     m_ams_not_match = ScalableBitmap(this, "filament_not_mactch", 25);
+    m_rack_nozzle_bitmap = ScalableBitmap(this, "dev_rack_nozzle_print_job", 22);
 
     m_material_coloul = mcolour;
     m_material_name = mname;
@@ -73,9 +77,7 @@ static void _add_containers(const AmsMapingPopup *                 win,
     SetDoubleBuffered(true);
 #endif //__WINDOWS__
 
-    SetSize(MATERIAL_ITEM_SIZE);
-    SetMinSize(MATERIAL_ITEM_SIZE);
-    SetMaxSize(MATERIAL_ITEM_SIZE);
+    messure_size();
     SetBackgroundColour(*wxWHITE);
 
     Bind(wxEVT_PAINT, &MaterialItem::paintEvent, this);
@@ -89,6 +91,7 @@ void MaterialItem::msw_rescale() {
     m_arraw_bitmap_white.msw_rescale();
     m_transparent_mitem.msw_rescale();
     m_ams_wheel_mitem.msw_rescale();
+    m_rack_nozzle_bitmap.msw_rescale();
 }
 
 void MaterialItem::allow_paint_dropdown(bool flag) {
@@ -114,11 +117,22 @@ void MaterialItem::set_ams_info(wxColour col, wxString txt, int ctype, std::vect
     BOOST_LOG_TRIVIAL(info) << "set_ams_info " << m_ams_name;
 }
 
+void MaterialItem::set_nozzle_info(const wxString& mapped_nozzle_str)
+{
+    if (m_mapped_nozzle_str != mapped_nozzle_str) {
+        m_mapped_nozzle_str = mapped_nozzle_str;
+        messure_size(); // a mapped nozzle adds/removes a row, changing the card height
+        Refresh();
+    }
+}
+
 void MaterialItem::reset_ams_info() {
     m_ams_name   = "-";
     m_ams_coloul = wxColour(0xCE, 0xCE, 0xCE);
     m_ams_cols.clear();
     m_ams_ctype = 0;
+    m_mapped_nozzle_str.Clear();
+    messure_size();
     Refresh();
 }
 
@@ -215,6 +229,11 @@ void MaterialItem::render(wxDC &dc)
         acolor = wxColour(0x90, 0x90, 0x90);
     }
 
+    // Header + AMS name keep their fixed-card positions; a mapped nozzle only adds a row below, so
+    // position this text against the base card height, not the grown one (else it slides down onto
+    // the nozzle row). Identical to GetSize().y when no nozzle row is present.
+    const float base_y = m_mapped_nozzle_str.IsEmpty() ? (float) GetSize().y : (float) MATERIAL_ITEM_SIZE.y;
+
     // materials name
     dc.SetFont(::Label::Body_13);
 
@@ -227,7 +246,7 @@ void MaterialItem::render(wxDC &dc)
     }
 
     auto material_txt_size = dc.GetTextExtent(m_material_name);
-    dc.DrawText(m_material_name, wxPoint((GetSize().x - material_txt_size.x) / 2, ((float)GetSize().y * 2 / 5 - material_txt_size.y) / 2));
+    dc.DrawText(m_material_name, wxPoint((GetSize().x - material_txt_size.x) / 2, (base_y * 2 / 5 - material_txt_size.y) / 2));
 
 
 
@@ -238,11 +257,11 @@ void MaterialItem::render(wxDC &dc)
     if (mapping_txt.size() >= 4) {
         mapping_txt.insert(mapping_txt.size() / 2, "\n");
         mapping_txt_size = dc.GetTextExtent(mapping_txt);
-        m_text_pos_y     = ((float) GetSize().y * 3 / 5 - mapping_txt_size.y) / 2 + (float) GetSize().y * 2 / 5 - mapping_txt_size.y / 2;
+        m_text_pos_y     = (base_y * 3 / 5 - mapping_txt_size.y) / 2 + base_y * 2 / 5 - mapping_txt_size.y / 2;
         m_text_pos_x     = mapping_txt_size.x / 4;
     } else {
         mapping_txt_size = dc.GetTextExtent(mapping_txt);
-        m_text_pos_y     = ((float) GetSize().y * 3 / 5 - mapping_txt_size.y) / 2 + (float) GetSize().y * 2 / 5;
+        m_text_pos_y     = (base_y * 3 / 5 - mapping_txt_size.y) / 2 + base_y * 2 / 5;
         m_text_pos_x     = 0;
     }
 
@@ -258,12 +277,73 @@ void MaterialItem::match(bool mat)
     Refresh();
 }
 
+// A filament can map to several rack nozzles; the joined "R1, R2, ..." string is wrapped to a few
+// slots per line so the label stays readable inside the narrow card.
+static constexpr size_t MAPPED_NOZZLE_STR_MAX_CHARS_PER_LINE = 7;
+
+static wxString s_wrap_mapped_nozzle_str(const wxString& text)
+{
+    if (text.length() <= MAPPED_NOZZLE_STR_MAX_CHARS_PER_LINE)
+        return text;
+
+    wxArrayString parts = wxSplit(text, ',');
+    wxString wrapped;
+    std::vector<wxString> buffers;
+    for (auto& part : parts) {
+        if (!part.empty())
+            buffers.push_back(part.Trim(false).Trim(true));
+
+        if (buffers.size() > 2) {
+            if (!wrapped.empty())
+                wrapped += "\n";
+            wrapped += buffers[0] + " " + buffers[1] + " " + buffers[2];
+            buffers.clear();
+        }
+    }
+
+    if (!wrapped.empty())
+        wrapped += "\n";
+    if (buffers.size() > 0)
+        wrapped += buffers[0];
+    if (buffers.size() > 1)
+        wrapped += " " + buffers[1];
+
+    return wrapped;
+}
+
+static int s_get_mapped_nozzle_str_line_count(const wxString& text)
+{
+    if (text.empty())
+        return 0;
+    return std::max(1, static_cast<int>(wxSplit(s_wrap_mapped_nozzle_str(text), '\n', '\0').size()));
+}
+
+void MaterialItem::messure_size()
+{
+    // Without a mapped nozzle the card is a fixed swatch + AMS wheel; a mapped nozzle adds a row
+    // below (glyph + slot label), growing the height by one text line per wrapped line.
+    if (m_mapped_nozzle_str.empty()) {
+        SetSize(MATERIAL_ITEM_SIZE);
+        SetMinSize(MATERIAL_ITEM_SIZE);
+        SetMaxSize(MATERIAL_ITEM_SIZE);
+    } else {
+        const int line_count = s_get_mapped_nozzle_str_line_count(m_mapped_nozzle_str);
+        const wxSize item_size(MATERIAL_ITEM_SIZE.x, FromDIP(84 + std::max(0, line_count - 1) * 10));
+        SetSize(item_size);
+        SetMinSize(item_size);
+        SetMaxSize(item_size);
+    }
+}
+
 void MaterialItem::doRender(wxDC& dc)
 {
     wxSize size = GetSize();
     auto mcolor = m_material_coloul;
     auto acolor = m_ams_coloul;
     change_the_opacity(acolor);
+    // Header + wheel keep their fixed-card geometry; when a nozzle row is present the extra height
+    // below is used for it, so lay out the top of the card against the base height, not the grown one.
+    const int base_y = m_mapped_nozzle_str.IsEmpty() ? size.y : MATERIAL_ITEM_SIZE.y;
 
     if (mcolor.Alpha() == 0) {
         dc.DrawBitmap(m_transparent_mitem.bmp(), FromDIP(1), FromDIP(1));
@@ -288,7 +368,7 @@ void MaterialItem::doRender(wxDC& dc)
 
     //bottom rectangle in wheel bitmap, size is MATERIAL_REC_WHEEL_SIZE(22)
     auto left = (size.x / 2 - MATERIAL_REC_WHEEL_SIZE.x) / 2 + FromDIP(3);
-    auto up = (size.y * 0.4 + (size.y * 0.6 - MATERIAL_REC_WHEEL_SIZE.y) / 2);
+    auto up = (base_y * 0.4 + (base_y * 0.6 - MATERIAL_REC_WHEEL_SIZE.y) / 2);
     auto right = left + MATERIAL_REC_WHEEL_SIZE.x - FromDIP(3);
     dc.SetPen(*wxTRANSPARENT_PEN);
     //bottom
@@ -350,12 +430,12 @@ void MaterialItem::doRender(wxDC& dc)
     }
 
     dc.SetBrush(*wxTRANSPARENT_BRUSH);
-    dc.DrawRoundedRectangle(FromDIP(0), FromDIP(0), MATERIAL_ITEM_SIZE.x - FromDIP(0), MATERIAL_ITEM_SIZE.y - FromDIP(0), 5);
+    dc.DrawRoundedRectangle(FromDIP(0), FromDIP(0), MATERIAL_ITEM_SIZE.x - FromDIP(0), size.y - FromDIP(0), 5);
 
     if (m_selected) {
         dc.SetPen(wxPen(AMS_CONTROL_BRAND_COLOUR, FromDIP(2)));
         dc.SetBrush(*wxTRANSPARENT_BRUSH);
-        dc.DrawRoundedRectangle(FromDIP(1), FromDIP(1), MATERIAL_ITEM_SIZE.x - FromDIP(1), MATERIAL_ITEM_SIZE.y - FromDIP(1), 5);
+        dc.DrawRoundedRectangle(FromDIP(1), FromDIP(1), MATERIAL_ITEM_SIZE.x - FromDIP(1), size.y - FromDIP(1), 5);
     }
 //#endif
     if (m_text_pos_y > 0 && m_match) {
@@ -368,7 +448,7 @@ void MaterialItem::doRender(wxDC& dc)
     }
 
     auto wheel_left = (GetSize().x / 2 - m_ams_wheel_mitem.GetBmpSize().x) / 2 + FromDIP(2);
-    auto wheel_top = ((float)GetSize().y * 0.6 - m_ams_wheel_mitem.GetBmpSize().y) / 2 + (float)GetSize().y * 0.4;
+    auto wheel_top = ((float)base_y * 0.6 - m_ams_wheel_mitem.GetBmpSize().y) / 2 + (float)base_y * 0.4;
 
     if (!m_match) {
         wheel_left += m_ams_wheel_mitem.GetBmpSize().x;
@@ -380,6 +460,29 @@ void MaterialItem::doRender(wxDC& dc)
             dc.DrawBitmap(m_ams_wheel_mitem.bmp(), wheel_left - FromDIP(LEFT_OFFSET), wheel_top);
         }
     }
+
+    // Rack / filament-switcher printers: draw the physical nozzle the print-dispatch mapping assigned
+    // to this filament — a divider, the rack-nozzle glyph, and the slot label ("R1", "L R", ...) in
+    // the extra row below the wheel. Nothing is drawn when no nozzle is mapped (all other printers).
+    if (!m_mapped_nozzle_str.IsEmpty()) {
+        int row_top = wheel_top + m_ams_wheel_mitem.GetBmpSize().y + FromDIP(4);
+        dc.SetPen(wxPen(wxColour("#CECECE"), 1, wxPENSTYLE_SHORT_DASH)); // Orca: WXCOLOUR_GREY400 macro not in scope here
+        dc.DrawLine(FromDIP(1), row_top, FromDIP(size.x), row_top);
+
+        int bitmap_y = row_top + (size.y - row_top - m_rack_nozzle_bitmap.GetBmpHeight()) / 2;
+        int bitmap_l = wheel_left + (m_ams_wheel_mitem.GetBmpWidth() - m_rack_nozzle_bitmap.GetBmpWidth()) / 2 + FromDIP(2);
+        dc.DrawBitmap(m_rack_nozzle_bitmap.bmp(), bitmap_l, bitmap_y);
+
+        // Orca: BBS width-fits this label via a get_suitable_font_size overload Orca lacks; the wrapped
+        // slot string is short, so a fixed label font renders it cleanly without that helper.
+        const wxString wrapped = s_wrap_mapped_nozzle_str(m_mapped_nozzle_str);
+        dc.SetFont(::Label::Head_12);
+        dc.SetTextForeground(StateColor::darkModeColorFor(wxColour(0x26, 0x2E, 0x30)));
+        const wxSize text_size = dc.GetMultiLineTextExtent(wrapped);
+        int text_x = (size.x + bitmap_l + m_rack_nozzle_bitmap.GetBmpWidth() - text_size.x) / 2;
+        int text_y = row_top + (size.y - row_top - text_size.y) / 2;
+        dc.DrawText(wrapped, text_x, text_y);
+    }
 }
 
 void MaterialItem::reset_valid_info() {
@@ -725,6 +828,16 @@ AmsMapingPopup::AmsMapingPopup(wxWindow *parent, bool use_in_sync_dialog) :
      m_right_first_text_panel->SetMaxSize(wxSize(-1, FromDIP(same_height)));
 
      m_sizer_ams_right->Add(m_right_first_text_panel, 0, wxEXPAND | wxBOTTOM | wxTOP, FromDIP(8));
+
+     // Flush-waste warning (rack printers only). Orca: uses a plain Label here.
+     // Hidden by default => zero layout effect for non-rack printers.
+     m_flush_warning_panel = new Label(m_right_marea_panel);
+     m_flush_warning_panel->SetFont(::Label::Body_12);
+     m_flush_warning_panel->SetForegroundColour(StateColor::darkModeColorFor("#F09A17"));
+     m_flush_warning_panel->SetBackgroundColour(StateColor::darkModeColorFor("#FFFFE0"));
+     m_flush_warning_panel->Show(false);
+     m_sizer_ams_right->Add(m_flush_warning_panel, 0, wxBOTTOM | wxALIGN_LEFT, FromDIP(8));
+
      m_right_split_ams_sizer = create_split_sizer(m_right_marea_panel, _L("Right AMS"));
      m_sizer_ams_right->Add(m_right_split_ams_sizer, 0, wxEXPAND, 0);
      m_sizer_ams_right->Add(m_sizer_ams_basket_right, 0, wxEXPAND|wxTOP, FromDIP(8));
@@ -740,6 +853,14 @@ AmsMapingPopup::AmsMapingPopup(wxWindow *parent, bool use_in_sync_dialog) :
      m_sizer_ams->Add(0, 0, 0, wxEXPAND, FromDIP(15));
      m_sizer_ams->Add(m_right_marea_panel, 1, wxEXPAND, FromDIP(0));
 
+     // Rack nozzle manual-pick, alongside the AMS area (rack printers only). Hidden by default
+     // => contributes nothing to layout for non-rack printers.
+     m_rack_nozzle_select = new wgtDeviceNozzleRackSelect(this);
+     m_rack_nozzle_select->Bind(EVT_NOZZLE_SELECT_CHANGED, &AmsMapingPopup::OnNozzleMappingSelected, this);
+     m_rack_nozzle_select->Bind(EVT_NOZZLE_SELECT_CLICKED, [this](wxCommandEvent& e) { this->Dismiss(); });
+     m_rack_nozzle_select->Show(false);
+     m_sizer_ams->Add(m_rack_nozzle_select, 0, wxEXPAND | wxTOP | wxLEFT, FromDIP(15));
+
      m_sizer_main->Add(title_panel, 0, wxEXPAND | wxALL, FromDIP(2));
      m_sizer_main->Add(m_sizer_ams, 0, wxEXPAND | wxLEFT | wxRIGHT, FromDIP(14));
      m_sizer_main->Add( 0, 0, 0, wxTOP, FromDIP(14));
@@ -782,6 +903,7 @@ void AmsMapingPopup::msw_rescale()
     m_right_extra_slot->msw_rescale();
     for (auto item : m_mapping_item_list) { item->msw_rescale(); }
     for (auto container : m_amsmapping_container_list) { container->msw_rescale(); }
+    if (m_rack_nozzle_select) { m_rack_nozzle_select->Rescale(); }
 
     Fit();
     Refresh();
@@ -1038,7 +1160,7 @@ void AmsMapingPopup::update_items_check_state(const std::vector<FilamentInfo>& a
     }
 }
 
-void AmsMapingPopup::update(MachineObject* obj, const std::vector<FilamentInfo>& ams_mapping_result)
+void AmsMapingPopup::update(MachineObject* obj, const std::vector<FilamentInfo>& ams_mapping_result, bool use_dynamic_switch, std::optional<PrintFromType> print_type)
 {
     //BOOST_LOG_TRIVIAL(info) << "ams_mapping nozzle count  " << obj->get_extder_system()->nozzle.size();
     BOOST_LOG_TRIVIAL(info) << "ams_mapping total count " << obj->GetFilaSystem()->GetAmsCount();
@@ -1252,11 +1374,68 @@ void AmsMapingPopup::update(MachineObject* obj, const std::vector<FilamentInfo>&
     } else {
         m_right_split_ams_sizer->Show(false);
     }
+
+    /*rack (manual nozzle pick; rack printers only)*/
+    update_rack_select(obj, use_dynamic_switch, print_type);
+    update_flush_waste(obj);
+
     Layout();
     Fit();
     Refresh();
 }
 
+void AmsMapingPopup::update_rack_select(MachineObject* obj, bool use_dynamic_switch, std::optional<PrintFromType> print_from_type)
+{
+    // Orca: MachineObject has no GetNozzleRack() convenience; route through the nozzle system instead.
+    m_rack = obj ? obj->GetNozzleSystem()->GetNozzleRack() : nullptr;
+
+    bool show_rack_select_area = false;
+    if (!m_mapping_from_multi_machines && !m_use_in_sync_dialog &&
+        obj && obj->GetNozzleSystem()->GetNozzleRack()->IsSupported() &&
+        print_from_type.has_value() && print_from_type.value() == PrintFromType::FROM_NORMAL) {
+        const auto& nozzle_pos_vec = obj->get_nozzle_mapping_result()->GetMappedNozzlePosVecByFilaId(m_current_filament_id);
+        m_rack_nozzle_select->UpdatSelectedNozzles(obj->GetNozzleSystem()->GetNozzleRack(), nozzle_pos_vec, use_dynamic_switch, print_from_type);
+        show_rack_select_area = true;
+    }
+
+    if (show_rack_select_area != m_rack_nozzle_select->IsShown()) {
+        m_right_tip_text = show_rack_select_area ? _L("Select Filament && Hotends") : _L("Select Filament");
+        m_right_tips->SetLabel(m_right_tip_text);
+        m_rack_nozzle_select->Show(show_rack_select_area);
+        Layout();
+        Fit();
+    }
+}
+
+void AmsMapingPopup::update_flush_waste(MachineObject* obj)
+{
+    if (!obj) {
+        m_flush_warning_panel->Hide();
+        return;
+    };
+
+    float flush_waste_base = obj->get_nozzle_mapping_result()->GetFlushWeightBase();
+    float flush_waste_current = obj->get_nozzle_mapping_result()->GetFlushWeightCurrent();
+    if ((flush_waste_base != -1) && (flush_waste_current != -1) && flush_waste_current > flush_waste_base) {
+        m_flush_warning_panel->SetLabel(wxString::Format(_L("Printing with the current nozzle may produce an extra %0.2f g of waste."), flush_waste_current - flush_waste_base));
+        m_flush_warning_panel->Show();
+    } else {
+        m_flush_warning_panel->Hide();
+    }
+}
+
+void AmsMapingPopup::OnNozzleMappingSelected(wxCommandEvent& evt)
+{
+    if (auto ptr = m_rack.lock()) {
+        MachineObject* obj = ptr->GetNozzleSystem()->GetOwner();
+        obj->get_nozzle_mapping_result()->SetManualNozzleMappingByFila(m_current_filament_id, m_rack_nozzle_select->GetSelectedNozzlePosID());
+        update_flush_waste(obj);
+    }
+
+    evt.Skip();
+    Dismiss();
+}
+
 std::vector<TrayData> AmsMapingPopup::parse_ams_mapping(const std::map<std::string, DevAms*, NumericStrCompare>& amsList)
 {
     std::vector<TrayData> m_tray_data;
@@ -2305,12 +2484,25 @@ _GetBackupStatus(unsigned int fila_back_group)
 
     for (int j = 16; j < 32; j++)/* single ams is from 128*/
     {
+        // N9 / AMS-Lite-mixed reports its four backup slots in bits 24-27, which decode directly to
+        // tray ids 24-27 (handled in the loop below). Keep those bits out of the single-ams (128+)
+        // range; all other bits keep their existing mapping unchanged.
+        if (j >= 24 && j <= 27)
+            continue;
         if (fila_back_group & (1 << j))
         {
             trayid_group[128 + j - 16] = true;
         }
     }
 
+    for (int i = 24; i <= 27; i++)/* ams lite for N9 */
+    {
+        if (fila_back_group & (1 << i))
+        {
+            trayid_group[i] = true;
+        }
+    }
+
     return trayid_group;
 }
 
diff --git a/src/slic3r/GUI/AmsMappingPopup.hpp b/src/slic3r/GUI/AmsMappingPopup.hpp
index bbfb967822..c264dadcbf 100644
--- a/src/slic3r/GUI/AmsMappingPopup.hpp
+++ b/src/slic3r/GUI/AmsMappingPopup.hpp
@@ -41,8 +41,15 @@
 
 #include "slic3r/GUI/DeviceCore/DevUtil.h"
 
+#include <optional>
+
 #define MAPPING_ITEM_INVALID_REMAIN -1
 
+namespace Slic3r {
+class DevNozzleRack;
+namespace GUI { class wgtDeviceNozzleRackSelect; }
+}
+
 namespace Slic3r { namespace GUI {
 
 
@@ -93,6 +100,9 @@ public:
     //info
     wxColour m_ams_coloul;
     wxString m_ams_name;
+    // Physical nozzle(s) the print-dispatch mapping assigned to this filament (e.g. "R1", "L R").
+    // Empty on printers without a nozzle rack or filament switcher; when set, the card grows a row.
+    wxString m_mapped_nozzle_str;
     int      m_ams_ctype = 0;
     std::vector<wxColour> m_ams_cols = std::vector<wxColour>();
     //reset
@@ -107,6 +117,7 @@ public:
     ScalableBitmap m_filament_wheel_transparent;
     ScalableBitmap m_ams_wheel_mitem;
     ScalableBitmap m_ams_not_match;
+    ScalableBitmap m_rack_nozzle_bitmap;
 
     bool m_selected {false};
     bool m_warning{false};
@@ -117,6 +128,10 @@ public:
     void allow_paint_dropdown(bool flag);
     void set_ams_info(wxColour col, wxString txt, int ctype=0, std::vector<wxColour> cols= std::vector<wxColour>(),bool record_back_info = false);
     void reset_ams_info();
+    // Set the mapped-nozzle label ("R1", "L R", ...); grows/shrinks the card as the row appears/clears.
+    void set_nozzle_info(const wxString& mapped_nozzle_str);
+    // Size the card: base swatch height, plus one row when a nozzle label is present.
+    void messure_size();
 
     void disable();
     void enable();
@@ -259,12 +274,19 @@ public:
     wxBoxSizer* m_sizer_split_ams_right;
     bool        m_mapping_from_multi_machines {false};
 
+    // Rack nozzle manual-pick (rack printers only; hidden by default via Show(false)).
+    wgtDeviceNozzleRackSelect* m_rack_nozzle_select{nullptr};
+    Label*                     m_flush_warning_panel{nullptr}; // Orca: uses a plain Label for the flush warning
+    std::weak_ptr<DevNozzleRack> m_rack;
+
     void         set_sizer_title(wxBoxSizer *sizer, wxString text);
     wxBoxSizer*  create_split_sizer(wxWindow* parent, wxString text);
     void         set_send_win(wxWindow* win) {send_win = win;};
     void         update_materials_list(std::vector<std::string> list);
     void         set_tag_texture(std::string texture);
-    void         update(MachineObject* obj, const std::vector<FilamentInfo>& ams_mapping_result);
+    void         update(MachineObject* obj, const std::vector<FilamentInfo>& ams_mapping_result, bool use_dynamic_switch = false, std::optional<PrintFromType> print_type = std::nullopt);
+    void         update_rack_select(MachineObject* obj, bool use_dynamic_switch, std::optional<PrintFromType> print_type);
+    void         update_flush_waste(MachineObject* obj);
     void         update_title(MachineObject* obj);
     void         update_items_check_state(const std::vector<FilamentInfo>& ams_mapping_result);
     void         update_ams_data_multi_machines();
@@ -295,6 +317,8 @@ public:
     void EnableExtMappingFilaTypeCheck(bool to_check = true) { m_ext_mapping_filatype_check = to_check;} ;
 
 private:
+    void OnNozzleMappingSelected(wxCommandEvent& evt);
+
     ResetCallback m_reset_callback{nullptr};
     std::string m_material_index;
     bool m_only_show_ext_spool{false};
diff --git a/src/slic3r/GUI/BackgroundSlicingProcess.cpp b/src/slic3r/GUI/BackgroundSlicingProcess.cpp
index 46ff3afff9..8c60b136b9 100644
--- a/src/slic3r/GUI/BackgroundSlicingProcess.cpp
+++ b/src/slic3r/GUI/BackgroundSlicingProcess.cpp
@@ -241,6 +241,9 @@ void BackgroundSlicingProcess::process_fff()
 		//BBS: add plate index into render params
 		m_temp_output_path = this->get_current_plate()->get_tmp_gcode_path();
 		m_fff_print->export_gcode(m_temp_output_path, m_gcode_result, [this](const ThumbnailsParams& params) { return this->render_thumbnails(params); });
+		// Orca: BBL printers post-process the g-code in place here and never re-parse it into a fresh
+		// GCodeProcessorResult, so m_gcode_result->nozzle_group_result (consumed by the H2C print-dispatch
+		// nozzle mapping) survives post-processing. No preservation guard is needed on this path.
 		if(m_fff_print->is_BBL_printer())
 			run_post_process_scripts(m_temp_output_path, false, "File", m_temp_output_path, m_fff_print->full_print_config());
 
diff --git a/src/slic3r/GUI/CaliHistoryDialog.cpp b/src/slic3r/GUI/CaliHistoryDialog.cpp
index 8ed0305369..2e7f2caf97 100644
--- a/src/slic3r/GUI/CaliHistoryDialog.cpp
+++ b/src/slic3r/GUI/CaliHistoryDialog.cpp
@@ -13,6 +13,9 @@
 #include "Plater.hpp"
 #include "DeviceCore/DevExtruderSystem.h"
 #include "DeviceCore/DevManager.h"
+#include "DeviceCore/DevConfigUtil.h"
+#include "DeviceCore/DevNozzleSystem.h"
+#include "DeviceCore/DevNozzleRack.h"
 
 namespace Slic3r {
 namespace GUI {
@@ -26,6 +29,7 @@ namespace GUI {
 enum CaliColumnType : int {
     Cali_Name = 0,
     Cali_Filament,
+    Cali_Nozzle_ID,
     Cali_Nozzle,
     Cali_K_Value,
     Cali_Delete,
@@ -33,6 +37,9 @@ enum CaliColumnType : int {
     Cali_Type_Count
 };
 
+// Orca: derive nozzle-volume support from the machine preset's nozzle_volume array
+// rather than a live device-capability query, to avoid flipping the Nozzle-Flow column
+// visibility on shipping printers (H2D/X1/P1/A1).
 bool support_nozzle_volume(const MachineObject* obj)
 {
     if (!obj)
@@ -49,14 +56,17 @@ bool support_nozzle_volume(const MachineObject* obj)
     return false;
 }
 
-int get_colume_idx(CaliColumnType type, MachineObject* obj)
+// Rack hotend position code -> label: 0 = fixed ("R"); >=0x10 = rack slot number; else N/A.
+static wxString nozzle_id_code_to_string(int code)
 {
-    if (!support_nozzle_volume(obj)
-        && (type > CaliColumnType::Cali_Nozzle)) {
-        return type - 1;
+    if (code == 0) {
+        return "R";
+    } else if (code >= 0x10) {
+        return wxString::Format("%d", code - 0x10 + 1);
+    } else {
+        BOOST_LOG_TRIVIAL(warning) << __FUNCTION__ << "Nozzle position id is -1 or invalid.";
+        return "N/A";
     }
-
-    return type;
 }
 
 static wxString get_preset_name_by_filament_id(std::string filament_id)
@@ -244,6 +254,10 @@ void HistoryWindow::on_device_connected(MachineObject* obj)
     }
     m_comboBox_nozzle_dia->SetSelection(selection);
 
+    m_extruder_switch_btn->SetLabels(
+        _L(DevPrinterConfigUtil::get_toolhead_display_name(obj->printer_type, DEPUTY_EXTRUDER_ID, ToolHeadComponent::Nozzle, ToolHeadNameCase::TitleCase)),
+        _L(DevPrinterConfigUtil::get_toolhead_display_name(obj->printer_type, MAIN_EXTRUDER_ID, ToolHeadComponent::Nozzle, ToolHeadNameCase::TitleCase)));
+
     if (obj->is_multi_extruders())
         m_extruder_switch_btn->Show();
     else
@@ -320,7 +334,21 @@ void HistoryWindow::enbale_action_buttons(bool enable) {
     }
 }
 
+// The main extruder can carry a nozzle rack (H2C); the Nozzle-ID column only shows for it.
+bool HistoryWindow::support_nozzle_id_column()
+{
+    if (!curr_obj || get_extruder_id() != MAIN_EXTRUDER_ID)
+        return false;
+    auto ns = curr_obj->GetNozzleSystem();
+    if (!ns)
+        return false;
+    auto rack = ns->GetNozzleRack();
+    return rack && rack->IsSupported();
+}
+
 void HistoryWindow::sync_history_data() {
+    int column_idx = 0;
+
     Freeze();
     m_history_data_panel->DestroyChildren();
     m_history_data_panel->Enable();
@@ -331,24 +359,35 @@ void HistoryWindow::sync_history_data() {
 
     m_history_data_panel->SetSizer(gbSizer, true);
 
+    const bool has_nozzle_id = support_nozzle_id_column();
+
     auto title_name = new Label(m_history_data_panel, _L("Name"));
     title_name->SetFont(Label::Head_14);
-    gbSizer->Add(title_name, {0, get_colume_idx(CaliColumnType::Cali_Name, curr_obj) }, {1, 1}, wxBOTTOM, FromDIP(15));
-    BOOST_LOG_TRIVIAL(info) << "=====================" << title_name->GetLabelText().ToStdString();
+    gbSizer->Add(title_name, {0, column_idx++ }, {1, 1}, wxBOTTOM, FromDIP(15));
 
     auto title_preset_name = new Label(m_history_data_panel, _L("Filament"));
     title_preset_name->SetFont(Label::Head_14);
-    gbSizer->Add(title_preset_name, { 0, get_colume_idx(CaliColumnType::Cali_Filament, curr_obj) }, { 1, 1 }, wxBOTTOM, FromDIP(15));
+    gbSizer->Add(title_preset_name, { 0, column_idx++ }, { 1, 1 }, wxBOTTOM, FromDIP(15));
+
+    if (has_nozzle_id) {
+        auto nozzle_id_name = new Label(m_history_data_panel, _L("Nozzle ID"));
+        nozzle_id_name->SetFont(Label::Head_14);
+        {
+            wxString chd_ext_name = _L(DevPrinterConfigUtil::get_toolhead_display_name(curr_obj->printer_type, MAIN_EXTRUDER_ID, ToolHeadComponent::Extruder, ToolHeadNameCase::LowerCase));
+            nozzle_id_name->SetToolTip(wxString::Format(_L("Note: The hotend number on the %s is tied to the holder. When the hotend is moved to a new holder, its number will update automatically."), chd_ext_name));
+        }
+        gbSizer->Add(nozzle_id_name, {0, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
+    }
 
     if (support_nozzle_volume(curr_obj)) {
         auto nozzle_name = new Label(m_history_data_panel, _L("Nozzle Flow"));
         nozzle_name->SetFont(Label::Head_14);
-        gbSizer->Add(nozzle_name, {0, get_colume_idx(CaliColumnType::Cali_Nozzle, curr_obj)}, {1, 1}, wxBOTTOM, FromDIP(15));
+        gbSizer->Add(nozzle_name, {0, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
     }
 
     auto title_k = new Label(m_history_data_panel, _L("Factor K"));
     title_k->SetFont(Label::Head_14);
-    gbSizer->Add(title_k, { 0, get_colume_idx(CaliColumnType::Cali_K_Value,curr_obj) }, { 1, 1 }, wxBOTTOM, FromDIP(15));
+    gbSizer->Add(title_k, { 0, column_idx++ }, { 1, 1 }, wxBOTTOM, FromDIP(15));
 
     // Hide
     //auto title_n = new Label(m_history_data_panel, wxID_ANY, _L("N"));
@@ -357,7 +396,12 @@ void HistoryWindow::sync_history_data() {
 
     auto title_action = new Label(m_history_data_panel, _L("Action"));
     title_action->SetFont(Label::Head_14);
-    gbSizer->Add(title_action, {0, get_colume_idx(CaliColumnType::Cali_Delete, curr_obj)}, {1, 1});
+    gbSizer->Add(title_action, {0, column_idx++}, {1, 1});
+
+    // grid item num in row (Delete + Edit share one "Action" header)
+    const int column_count = column_idx + 1;
+    // reset column_idx for the data rows
+    column_idx = 0;
 
     int i = 1;
     for (auto& result : m_calib_results_history) {
@@ -373,13 +417,13 @@ void HistoryWindow::sync_history_data() {
         n_value->Hide();
         auto delete_button = new Button(m_history_data_panel, _L("Delete"));
         delete_button->SetStyle(ButtonStyle::Alert, ButtonType::Window);
-        delete_button->Bind(wxEVT_BUTTON, [this, gbSizer, i, &result](auto& e) {
+        delete_button->Bind(wxEVT_BUTTON, [this, gbSizer, i, &result, column_count](auto& e) {
             if (m_ui_op_lock) {
                 return;
             } else {
                 m_ui_op_lock = true;
             }
-            for (int j = 0; j < HISTORY_WINDOW_ITEMS_COUNT; j++) {
+            for (int j = 0; j < column_count; j++) {
                 auto item = gbSizer->FindItemAtPosition({ i, j });
                 if (item && item->GetWindow())
                     item->GetWindow()->Hide();
@@ -392,6 +436,8 @@ void HistoryWindow::sync_history_data() {
             cali_info.cali_idx        = result.cali_idx;
             cali_info.nozzle_diameter = result.nozzle_diameter;
             cali_info.filament_id     = result.filament_id;
+            cali_info.nozzle_pos_id   = result.nozzle_pos_id;
+            cali_info.nozzle_sn       = result.nozzle_sn;
             CalibUtils::delete_PA_calib_result(cali_info);
             });
 
@@ -418,17 +464,23 @@ void HistoryWindow::sync_history_data() {
             }
             });
 
-        gbSizer->Add(name_value, {i, get_colume_idx(CaliColumnType::Cali_Name, curr_obj)}, {1, 1}, wxBOTTOM, FromDIP(15));
-        gbSizer->Add(preset_name_value, {i, get_colume_idx(CaliColumnType::Cali_Filament, curr_obj)}, {1, 1}, wxBOTTOM, FromDIP(15));
+        gbSizer->Add(name_value, {i, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
+        gbSizer->Add(preset_name_value, {i, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
+        if (has_nozzle_id) {
+            wxString nozzle_id       = nozzle_id_code_to_string(result.nozzle_pos_id);
+            auto     nozzle_id_label = new Label(m_history_data_panel, nozzle_id);
+            gbSizer->Add(nozzle_id_label, {i, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
+        }
         if (support_nozzle_volume(curr_obj)) {
             wxString nozzle_name       = get_nozzle_volume_type_name(result.nozzle_volume_type);
             auto     nozzle_name_label = new Label(m_history_data_panel, nozzle_name);
-            gbSizer->Add(nozzle_name_label, {i, get_colume_idx(CaliColumnType::Cali_Nozzle, curr_obj)}, {1, 1}, wxBOTTOM, FromDIP(15));
+            gbSizer->Add(nozzle_name_label, {i, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
         }
-        gbSizer->Add(k_value, {i, get_colume_idx(CaliColumnType::Cali_K_Value, curr_obj)}, {1, 1}, wxBOTTOM, FromDIP(15));
+        gbSizer->Add(k_value, {i, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
         //gbSizer->Add(n_value, { i, 3 }, { 1, 1 }, wxBOTTOM, FromDIP(15));
-        gbSizer->Add(delete_button, {i, get_colume_idx(CaliColumnType::Cali_Delete, curr_obj)}, {1, 1}, wxBOTTOM, FromDIP(15));
-        gbSizer->Add(edit_button, {i, get_colume_idx(CaliColumnType::Cali_Edit, curr_obj)}, {1, 1}, wxBOTTOM, FromDIP(15));
+        gbSizer->Add(delete_button, {i, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
+        gbSizer->Add(edit_button, {i, column_idx++}, {1, 1}, wxBOTTOM, FromDIP(15));
+        column_idx = 0;
         i++;
         m_ui_op_lock = false;
     }
@@ -523,13 +575,22 @@ EditCalibrationHistoryDialog::EditCalibrationHistoryDialog(wxWindow
     if (obj && obj->is_multi_extruders()) {
 
         Label   *extruder_name_title = new Label(top_panel, _L("Extruder"));
-        int    extruder_index      = obj->is_main_extruder_on_left() ? result.extruder_id : 1 - result.extruder_id;
-        wxString extruder_name       = extruder_index == 0 ? _L("Left") : _L("Right");
+        wxString extruder_name       = _L(DevPrinterConfigUtil::get_toolhead_display_name(
+            obj->printer_type, result.extruder_id, ToolHeadComponent::Extruder, ToolHeadNameCase::TitleCase, true));
         Label   *extruder_name_value   = new Label(top_panel, extruder_name);
         flex_sizer->Add(extruder_name_title);
         flex_sizer->Add(extruder_name_value);
     }
 
+    if (obj && obj->GetNozzleSystem() && obj->GetNozzleSystem()->GetNozzleRack()
+        && obj->GetNozzleSystem()->GetNozzleRack()->IsSupported() && result.extruder_id == MAIN_EXTRUDER_ID) {
+        Label*   nozzle_id_title = new Label(top_panel, _L("Nozzle ID"));
+        wxString nozzle_id       = nozzle_id_code_to_string(result.nozzle_pos_id);
+        Label*   nozzle_id_value = new Label(top_panel, nozzle_id);
+        flex_sizer->Add(nozzle_id_title);
+        flex_sizer->Add(nozzle_id_value);
+    }
+
     if (support_nozzle_volume(curr_obj)) {
         Label                 *nozzle_name_title = new Label(top_panel, _L("Nozzle"));
         wxString               nozzle_name;
@@ -768,14 +829,40 @@ NewCalibrationHistoryDialog::NewCalibrationHistoryDialog(wxWindow *parent, const
         Label *extruder_name_title = new Label(top_panel, _L("Extruder"));
         m_comboBox_extruder      = new ::ComboBox(top_panel, wxID_ANY, wxEmptyString, wxDefaultPosition, NEW_HISTORY_DIALOG_INPUT_SIZE, 0, nullptr, wxCB_READONLY);
         wxArrayString extruder_items;
-        extruder_items.push_back(_L("Left"));
-        extruder_items.push_back(_L("Right"));
+        extruder_items.push_back(_L(DevPrinterConfigUtil::get_toolhead_display_name(
+            curr_obj->printer_type, DEPUTY_EXTRUDER_ID, ToolHeadComponent::Extruder, ToolHeadNameCase::TitleCase, true)));
+        extruder_items.push_back(_L(DevPrinterConfigUtil::get_toolhead_display_name(
+            curr_obj->printer_type, MAIN_EXTRUDER_ID, ToolHeadComponent::Extruder, ToolHeadNameCase::TitleCase, true)));
         m_comboBox_extruder->Set(extruder_items);
         m_comboBox_extruder->SetSelection(-1);
         flex_sizer->Add(extruder_name_title);
         flex_sizer->Add(m_comboBox_extruder);
     }
 
+    // Nozzle ID (rack printers only): choose the hotend position this manual record belongs to.
+    if (curr_obj->GetNozzleSystem() && curr_obj->GetNozzleSystem()->GetNozzleRack()
+        && curr_obj->GetNozzleSystem()->GetNozzleRack()->IsSupported()) {
+        auto rack = curr_obj->GetNozzleSystem()->GetNozzleRack();
+        Label *nozzle_id_title = new Label(top_panel, _L("Nozzle ID"));
+        m_comboBox_nozzle_id   = new ::ComboBox(top_panel, wxID_ANY, wxEmptyString, wxDefaultPosition, NEW_HISTORY_DIALOG_INPUT_SIZE, 0, nullptr, wxCB_READONLY);
+        m_comboBox_nozzle_id->Bind(wxEVT_COMMAND_COMBOBOX_SELECTED, &NewCalibrationHistoryDialog::on_select_nozzle_pos, this);
+
+        auto main_extder = curr_obj->GetExtderSystem()->GetExtderById(MAIN_EXTRUDER_ID);
+        int  r_nozzle_id = main_extder ? main_extder->GetNozzleId() : 0;
+        auto r_nozzle    = curr_obj->GetNozzleSystem()->GetExtNozzle(r_nozzle_id);
+        if (r_nozzle.IsNormal()) {
+            m_comboBox_nozzle_id->Append("R", wxNullBitmap, new int{0});
+        }
+        for (auto nozzle_item : rack->GetRackNozzles()) {
+            if (nozzle_item.second.IsNormal()) {
+                m_comboBox_nozzle_id->Append(wxString::Format("%d", nozzle_item.first + 1), wxNullBitmap, new int{0x10 | nozzle_item.first});
+            }
+        }
+        m_comboBox_nozzle_id->SetSelection(-1);
+        flex_sizer->Add(nozzle_id_title);
+        flex_sizer->Add(m_comboBox_nozzle_id);
+    }
+
     if (support_nozzle_volume(curr_obj)) {
         Label *nozzle_name_title = new Label(top_panel, _L("Nozzle"));
         m_comboBox_nozzle_type   = new ::ComboBox(top_panel, wxID_ANY, wxEmptyString, wxDefaultPosition, NEW_HISTORY_DIALOG_INPUT_SIZE, 0, nullptr, wxCB_READONLY);
@@ -839,6 +926,35 @@ int NewCalibrationHistoryDialog::get_extruder_id(int extruder_index)
     return 0;
 }
 
+int NewCalibrationHistoryDialog::get_nozzle_combo_id_code() const
+{
+    if (!m_comboBox_nozzle_id)
+        return -1;
+
+    auto sel = m_comboBox_nozzle_id->GetSelection();
+    if (sel != wxNOT_FOUND && m_comboBox_nozzle_id->GetClientData(sel))
+        return *(reinterpret_cast<int*>(m_comboBox_nozzle_id->GetClientData(sel)));
+
+    return -1;
+}
+
+void NewCalibrationHistoryDialog::on_select_nozzle_pos(wxCommandEvent &event)
+{
+    // Mirror the picked hotend's flow onto the (Orca index-based) nozzle-type combo.
+    if (!curr_obj || !m_comboBox_nozzle_id || !m_comboBox_nozzle_type || !curr_obj->GetNozzleSystem())
+        return;
+
+    int pos = get_nozzle_combo_id_code();
+    if (pos < 0)
+        return;
+
+    DevNozzle nozzle = curr_obj->GetNozzleSystem()->GetNozzleByPosId(pos);
+    if (nozzle.IsNormal()) {
+        NozzleVolumeType volume_type = DevNozzle::ToNozzleVolumeType(nozzle.GetNozzleFlowType());
+        m_comboBox_nozzle_type->SetSelection(static_cast<int>(volume_type));
+    }
+}
+
 void NewCalibrationHistoryDialog::on_ok(wxCommandEvent &event)
 {
     wxString name = m_name_value->GetTextCtrl()->GetValue();
@@ -897,6 +1013,7 @@ void NewCalibrationHistoryDialog::on_ok(wxCommandEvent &event)
     m_new_result.nozzle_diameter = nozzle_value;
     m_new_result.filament_id = filament_id;
     m_new_result.setting_id = setting_id;
+    m_new_result.nozzle_pos_id = get_nozzle_combo_id_code();
 
     // Check for duplicate names from history
     {
diff --git a/src/slic3r/GUI/CaliHistoryDialog.hpp b/src/slic3r/GUI/CaliHistoryDialog.hpp
index 3eb0a84f9d..d5159b634c 100644
--- a/src/slic3r/GUI/CaliHistoryDialog.hpp
+++ b/src/slic3r/GUI/CaliHistoryDialog.hpp
@@ -27,6 +27,7 @@ protected:
     void enbale_action_buttons(bool enable);
     float get_nozzle_value();
     int get_extruder_id();
+    bool support_nozzle_id_column();
 
     void on_click_new_button(wxCommandEvent &event);
 
@@ -76,10 +77,12 @@ public:
 protected:
     virtual void on_ok(wxCommandEvent &event);
     virtual void on_cancel(wxCommandEvent &event);
+    void on_select_nozzle_pos(wxCommandEvent &event);
 
 
     wxArrayString get_all_filaments(const MachineObject *obj);
     int get_extruder_id(int extruder_index);  // extruder_index 0 : left, 1 : right
+    int get_nozzle_combo_id_code() const;      // rack hotend position code, -1 if none
 
 protected:
     PACalibResult m_new_result;
@@ -93,6 +96,7 @@ protected:
     ComboBox *m_comboBox_filament;
     ComboBox *m_comboBox_extruder;
     ComboBox *m_comboBox_nozzle_type;
+    ComboBox *m_comboBox_nozzle_id{nullptr};
 
     struct FilamentInfos
     {
diff --git a/src/slic3r/GUI/CalibrationWizardPresetPage.cpp b/src/slic3r/GUI/CalibrationWizardPresetPage.cpp
index 970635c770..db97354ad1 100644
--- a/src/slic3r/GUI/CalibrationWizardPresetPage.cpp
+++ b/src/slic3r/GUI/CalibrationWizardPresetPage.cpp
@@ -9,7 +9,9 @@
 #include "DeviceCore/DevExtruderSystem.h"
 #include "DeviceCore/DevFilaBlackList.h"
 #include "DeviceCore/DevFilaSystem.h"
+#include "DeviceCore/DevFilaSwitch.h"
 #include "DeviceCore/DevManager.h"
+#include "DeviceCore/DevNozzleSystem.h"
 #include "DeviceCore/DevStorage.h"
 
 #define CALIBRATION_LABEL_SIZE wxSize(FromDIP(150), FromDIP(24))
@@ -1457,31 +1459,40 @@ bool CalibrationPresetPage::is_filament_in_blacklist(int tray_id, Preset* preset
     get_tray_ams_and_slot_id(curr_obj, tray_id, ams_id, slot_id, out_tray_id);
 
     if (wxGetApp().app_config->get("skip_ams_blacklist_check") != "true") {
-        bool in_blacklist = false;
-        std::string action;
-        wxString info;
-        std::string filamnt_type;
-        preset->get_filament_type(filamnt_type);
+        DevFilaBlacklist::CheckFilamentInfo check_info;
+        check_info.dev_id   = curr_obj->get_dev_id();
+        check_info.model_id = curr_obj->printer_type;
+        check_info.fila_id  = preset->filament_id;
+        preset->get_filament_type(check_info.fila_type);
+        check_info.ams_id   = ams_id;
+        check_info.slot_id  = slot_id;
+        check_info.has_filament_switch = curr_obj->GetFilaSwitch()->IsInstalled();
+        // fila_name intentionally left empty: the engine recovers it from the selected AMS slot,
+        // preserving the name-match behavior.
 
         auto vendor = dynamic_cast<ConfigOptionStrings*> (preset->config.option("filament_vendor"));
         if (vendor && (vendor->values.size() > 0)) {
-            std::string vendor_name = vendor->values[0];
-            DevFilaBlacklist::check_filaments_in_blacklist(curr_obj->printer_type, vendor_name, filamnt_type, preset->filament_id, ams_id, slot_id, "", in_blacklist, action, info);
+            check_info.fila_vendor = vendor->values[0];
         }
 
-        if (in_blacklist) {
-            error_tips = info.ToUTF8().data();
-            if (action == "prohibition") {
-                return false;
-            }
-            else if (action == "warning") {
-                return true;
-            }
+        const auto &result = DevFilaBlacklist::check_filaments_in_blacklist(check_info);
+
+        if (const auto &prohibition_items = result.get_items_by_action("prohibition"); !prohibition_items.empty()) {
+            wxString combined_msg;
+            for (const auto &item : prohibition_items) { combined_msg += item.info_msg + "\n"; }
+            error_tips = combined_msg.ToUTF8().data();
+            return false;
         }
-        else {
-            error_tips = "";
+
+        if (const auto &warning_items = result.get_items_by_action("warning"); !warning_items.empty()) {
+            wxString combined_msg;
+            for (const auto &item : warning_items) { combined_msg += item.info_msg + "\n"; }
+            error_tips = combined_msg.ToUTF8().data();
             return true;
         }
+
+        error_tips = "";
+        return true;
     }
     if (devPrinterUtil::IsVirtualSlot(ams_id)) {
         if (m_cali_mode == CalibMode::Calib_PA_Line && (m_cali_method == CalibrationMethod::CALI_METHOD_AUTO || m_cali_method == CalibrationMethod::CALI_METHOD_NEW_AUTO)) {
@@ -1663,7 +1674,9 @@ bool CalibrationPresetPage::is_nozzle_info_synced() const
         if (curr_obj->is_nozzle_flow_type_supported()) {
             if (extruder.GetNozzleFlowType() == NozzleFlowType::NONE_FLOWTYPE)
                 return false;
-            if (int(extruder.GetNozzleFlowType()) - 1 != int(get_nozzle_volume_type(extruder_id)))
+            // Map device flow -> volume type via DevNozzle::ToNozzleVolumeType so U_FLOW resolves to
+            // nvtTPUHighFlow(3); the naive flow-1 would yield nvtHybrid(2). Identical to flow-1 for S/H flow.
+            if (int(DevNozzle::ToNozzleVolumeType(extruder.GetNozzleFlowType())) != int(get_nozzle_volume_type(extruder_id)))
                 return false;
         }
     }
@@ -2124,7 +2137,7 @@ void CalibrationPresetPage::init_with_machine(MachineObject* obj)
                 }
 
                 if (obj->GetExtderSystem()->GetNozzleFlowType(i) != NozzleFlowType::NONE_FLOWTYPE) {
-                    m_left_comboBox_nozzle_volume->SetSelection(obj->GetExtderSystem()->GetNozzleFlowType(i) - 1);
+                    m_left_comboBox_nozzle_volume->SetSelection(int(DevNozzle::ToNozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(i))));
                 } else {
                     m_left_comboBox_nozzle_volume->SetSelection(0);
                 }
@@ -2144,7 +2157,7 @@ void CalibrationPresetPage::init_with_machine(MachineObject* obj)
                 }
 
                 if (obj->GetExtderSystem()->GetNozzleFlowType(i) != NozzleFlowType::NONE_FLOWTYPE) {
-                    m_right_comboBox_nozzle_volume->SetSelection(obj->GetExtderSystem()->GetNozzleFlowType(i) - 1);
+                    m_right_comboBox_nozzle_volume->SetSelection(int(DevNozzle::ToNozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(i))));
                 } else {
                     m_right_comboBox_nozzle_volume->SetSelection(0);
                 }
@@ -2182,7 +2195,7 @@ void CalibrationPresetPage::init_with_machine(MachineObject* obj)
     else {
         if ((obj->GetExtderSystem()->GetTotalExtderCount() > 0) && (obj->GetExtderSystem()->GetNozzleFlowType(0) != NozzleFlowType::NONE_FLOWTYPE))
         {
-            m_comboBox_nozzle_volume->SetSelection(obj->GetExtderSystem()->GetNozzleFlowType(0) - 1);
+            m_comboBox_nozzle_volume->SetSelection(int(DevNozzle::ToNozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(0))));
         } else {
             m_comboBox_nozzle_volume->SetSelection(0);
         }
diff --git a/src/slic3r/GUI/CalibrationWizardSavePage.cpp b/src/slic3r/GUI/CalibrationWizardSavePage.cpp
index f14238d990..78bc4bb77f 100644
--- a/src/slic3r/GUI/CalibrationWizardSavePage.cpp
+++ b/src/slic3r/GUI/CalibrationWizardSavePage.cpp
@@ -2,6 +2,9 @@
 #include "I18N.hpp"
 #include "Widgets/Label.hpp"
 #include "MsgDialog.hpp"
+#include "DeviceCore/DevConfigUtil.h"
+#include "DeviceCore/DevNozzleSystem.h"
+#include "DeviceCore/DevNozzleRack.h"
 
 
 namespace Slic3r { namespace GUI {
@@ -95,35 +98,43 @@ enum class GridTextInputType {
 class GridTextInput : public TextInput
 {
 public:
-    GridTextInput(wxWindow* parent, wxString text, wxString label, wxSize size, int col_idx, GridTextInputType type);
+    GridTextInput(wxWindow* parent, wxString text, wxString label, wxSize size, int col_idx, GridTextInputType type, int extruder_id = MAIN_EXTRUDER_ID);
     int get_col_idx() { return m_col_idx; }
     void set_col_idx(int idx) { m_col_idx = idx; }
+    int get_extruder_id() { return m_extruder_id; }
+    void set_extruder_id(int id) { m_extruder_id = id; }
     GridTextInputType get_type() { return m_type; }
     void set_type(GridTextInputType type) { m_type = type; }
 private:
     int m_col_idx;
+    int m_extruder_id{MAIN_EXTRUDER_ID};
     GridTextInputType m_type;
 };
 
-GridTextInput::GridTextInput(wxWindow* parent, wxString text, wxString label, wxSize size, int col_idx, GridTextInputType type)
+GridTextInput::GridTextInput(wxWindow* parent, wxString text, wxString label, wxSize size, int col_idx, GridTextInputType type, int extruder_id)
     : TextInput(parent, text, label, "", wxDefaultPosition, size, wxTE_PROCESS_ENTER)
     , m_col_idx(col_idx)
+    , m_extruder_id(extruder_id)
     , m_type(type)
 {
 }
 
 class GridComboBox : public ComboBox {
 public:
-    GridComboBox(wxWindow* parent, wxSize size, int col_idx);
+    GridComboBox(wxWindow* parent, wxSize size, int col_idx, int extruder_id = MAIN_EXTRUDER_ID);
     int get_col_idx() { return m_col_idx; }
     void set_col_idx(int idx) { m_col_idx = idx; }
+    int get_extruder_id() { return m_extruder_id; }
+    void set_extruder_id(int id) { m_extruder_id = id; }
 private:
     int m_col_idx;
+    int m_extruder_id{MAIN_EXTRUDER_ID};
 };
 
-GridComboBox::GridComboBox(wxWindow* parent, wxSize size, int col_idx)
+GridComboBox::GridComboBox(wxWindow* parent, wxSize size, int col_idx, int extruder_id)
     : ComboBox(parent, wxID_ANY, "", wxDefaultPosition, size, 0, nullptr)
     , m_col_idx(col_idx)
+    , m_extruder_id(extruder_id)
 {
 
 }
@@ -227,7 +238,7 @@ void CaliPASaveAutoPanel::sync_cali_result(const std::vector<PACalibResult>& cal
     m_calib_results.clear();
     for (auto& item : cali_result) {
         if (item.confidence == 0)
-            m_calib_results[item.tray_id] = item;
+            m_calib_results.push_back(item);
     }
     m_grid_panel->DestroyChildren();
     auto grid_sizer = new wxBoxSizer(wxHORIZONTAL);
@@ -281,14 +292,14 @@ void CaliPASaveAutoPanel::sync_cali_result(const std::vector<PACalibResult>& cal
         wxString tray_name = get_tray_name_by_tray_id(item.tray_id);
         tray_title->SetLabel(tray_name);
 
-        auto k_value = new GridTextInput(m_grid_panel, "", "", CALIBRATION_SAVE_INPUT_SIZE, item.tray_id, GridTextInputType::K);
-        auto n_value = new GridTextInput(m_grid_panel, "", "", CALIBRATION_SAVE_INPUT_SIZE, item.tray_id, GridTextInputType::N);
+        auto k_value = new GridTextInput(m_grid_panel, "", "", CALIBRATION_SAVE_INPUT_SIZE, item.tray_id, GridTextInputType::K, item.extruder_id);
+        auto n_value = new GridTextInput(m_grid_panel, "", "", CALIBRATION_SAVE_INPUT_SIZE, item.tray_id, GridTextInputType::N, item.extruder_id);
         k_value->GetTextCtrl()->SetValidator(wxTextValidator(wxFILTER_NUMERIC));
         n_value->GetTextCtrl()->SetValidator(wxTextValidator(wxFILTER_NUMERIC));
         auto k_value_failed = new Label(m_grid_panel, _L("Failed"));
         auto n_value_failed = new Label(m_grid_panel, _L("Failed"));
 
-        auto comboBox_tray_name = new GridComboBox(m_grid_panel, CALIBRATION_SAVE_INPUT_SIZE, item.tray_id);
+        auto comboBox_tray_name = new GridComboBox(m_grid_panel, CALIBRATION_SAVE_INPUT_SIZE, item.tray_id, item.extruder_id);
         auto tray_name_failed = new Label(m_grid_panel, " - ");
         wxArrayString selections;
         static std::vector<PACalibResult> filtered_results;
@@ -395,17 +406,26 @@ void CaliPASaveAutoPanel::save_to_result_from_widgets(wxWindow* window, bool* ou
         return;
 
     //operate
+    // The grid can hold two rows with the same tray_id under different extruders
+    // (rack / dual-address configs), so results must be keyed by (tray_id, extruder_id).
+    auto find_result = [this](int tray_id, int extruder_id) -> PACalibResult* {
+        auto it = std::find_if(m_calib_results.begin(), m_calib_results.end(), [tray_id, extruder_id](const PACalibResult& r) {
+            return r.tray_id == tray_id && r.extruder_id == extruder_id;
+        });
+        return it != m_calib_results.end() ? &(*it) : nullptr;
+    };
     auto input = dynamic_cast<GridTextInput*>(window);
     if (input && input->IsShown()) {
-        int tray_id = input->get_col_idx();
+        int tray_id     = input->get_col_idx();
+        int extruder_id = input->get_extruder_id();
         if (input->get_type() == GridTextInputType::K) {
             float k = 0.0f;
             if (!CalibUtils::validate_input_k_value(input->GetTextCtrl()->GetValue(), &k)) {
                 *out_msg = wxString::Format(_L("Please input a valid value (K in %.1f~%.1f)"), MIN_PA_K_VALUE, MAX_PA_K_VALUE);
                 *out_is_valid = false;
             }
-            else
-                m_calib_results[tray_id].k_value = k;
+            else if (auto* result = find_result(tray_id, extruder_id))
+                result->k_value = k;
         }
         else if (input->get_type() == GridTextInputType::N) {
         }
@@ -413,7 +433,8 @@ void CaliPASaveAutoPanel::save_to_result_from_widgets(wxWindow* window, bool* ou
 
     auto comboBox = dynamic_cast<GridComboBox*>(window);
     if (comboBox && comboBox->IsShown()) {
-        int tray_id = comboBox->get_col_idx();
+        int tray_id     = comboBox->get_col_idx();
+        int extruder_id = comboBox->get_extruder_id();
         wxString name = comboBox->GetTextCtrl()->GetValue().ToStdString();
         if (name.IsEmpty()) {
             *out_msg = _L("Please enter the name you want to save to printer.");
@@ -423,7 +444,8 @@ void CaliPASaveAutoPanel::save_to_result_from_widgets(wxWindow* window, bool* ou
             *out_msg = _L("The name cannot exceed 40 characters.");
             *out_is_valid = false;
         }
-        m_calib_results[tray_id].name = into_u8(name);
+        if (auto* result = find_result(tray_id, extruder_id))
+            result->name = into_u8(name);
     }
 
     auto childern = window->GetChildren();
@@ -441,52 +463,7 @@ bool CaliPASaveAutoPanel::get_result(std::vector<PACalibResult>& out_result) {
     else
         save_to_result_from_widgets(m_grid_panel, &is_valid, &err_msg);
     if (is_valid) {
-        /*
-        std::vector<PACalibResult> to_save_result;
-        for (auto &result : m_calib_results) {
-            auto iter = std::find_if(to_save_result.begin(), to_save_result.end(), [this, &result](const PACalibResult &item) {
-                bool has_same_name = (item.name == result.second.name && item.filament_id == result.second.filament_id);
-                if (m_obj && m_obj->is_multi_extruders()) {
-                    has_same_name &= (item.extruder_id == result.second.extruder_id && item.nozzle_volume_type == result.second.nozzle_volume_type);
-                }
-                return has_same_name;
-            });
-
-            if (iter != to_save_result.end()) {
-                MessageDialog msg_dlg(nullptr, _L("Only one of the results with the same name will be saved. Are you sure you want to overwrite the other results?"),
-                                      wxEmptyString, wxICON_WARNING | wxYES_NO);
-                if (msg_dlg.ShowModal() != wxID_YES) {
-                    return false;
-                } else {
-                    break;
-                }
-            }
-        }
-
-        for (auto &result : m_history_results) {
-            auto iter = std::find_if(m_history_results.begin(), m_history_results.end(), [this, &result](const PACalibResult &item) {
-                bool has_same_name = (item.name == result.name && item.filament_id == result.filament_id);
-                if (m_obj && m_obj->is_multi_extruders()) {
-                    has_same_name &= (item.extruder_id == result.extruder_id && item.nozzle_volume_type == result.nozzle_volume_type);
-                }
-                return has_same_name;
-            });
-
-            if (iter != m_history_results.end()) {
-                 MessageDialog msg_dlg(nullptr,
-                                      wxString::Format(_L("There is already a historical calibration result with the same name: %s. Are you sure you want to override the historical result?"),
-                                                       result.name),
-                                      wxEmptyString, wxICON_WARNING | wxYES_NO);
-                if (msg_dlg.ShowModal() != wxID_YES) {
-                    return false;
-                }
-            }
-        }
-        */
-
-        for (auto& result : m_calib_results) {
-            out_result.push_back(result.second);
-        }
+        out_result = m_calib_results;
         return true;
     }
     else {
@@ -517,11 +494,12 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
     m_calib_results.clear();
     for (auto &item : cali_result) {
         if (item.confidence == 0) {
-            int tray_id = 4 * item.ams_id + item.slot_id;
+            PACalibResult result = item;
+            result.tray_id = 4 * item.ams_id + item.slot_id;
             if (item.ams_id == VIRTUAL_TRAY_MAIN_ID || item.ams_id == VIRTUAL_TRAY_DEPUTY_ID) {
-                tray_id = item.ams_id;
+                result.tray_id = item.ams_id;
             }
-            m_calib_results[tray_id] = item;
+            m_calib_results.push_back(result);
         }
     }
     m_multi_extruder_grid_panel->DestroyChildren();
@@ -532,14 +510,21 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
     m_multi_extruder_grid_panel->SetSizer(grid_sizer, true);
     m_multi_extruder_grid_panel->Bind(wxEVT_LEFT_DOWN, [this](auto &e) { SetFocusIgnoringChildren(); });
 
-    wxStaticBoxSizer *left_sizer  = new wxStaticBoxSizer(wxVERTICAL, m_multi_extruder_grid_panel, _L("Left extruder"));
-    wxStaticBoxSizer *right_sizer = new wxStaticBoxSizer(wxVERTICAL, m_multi_extruder_grid_panel, _L("Right extruder"));
+    const std::string& cwsp_pt = m_obj->printer_type;
+    wxStaticBoxSizer *left_sizer  = new wxStaticBoxSizer(wxVERTICAL, m_multi_extruder_grid_panel, _L(DevPrinterConfigUtil::get_toolhead_display_name(cwsp_pt, DEPUTY_EXTRUDER_ID, ToolHeadComponent::Extruder, ToolHeadNameCase::SentenceCase)));
+    wxStaticBoxSizer *right_sizer = new wxStaticBoxSizer(wxVERTICAL, m_multi_extruder_grid_panel, _L(DevPrinterConfigUtil::get_toolhead_display_name(cwsp_pt, MAIN_EXTRUDER_ID, ToolHeadComponent::Extruder, ToolHeadNameCase::SentenceCase)));
     grid_sizer->Add(left_sizer);
     grid_sizer->AddSpacer(COLUMN_GAP);
     grid_sizer->Add(right_sizer);
 
     wxFlexGridSizer *left_grid_sizer  = new wxFlexGridSizer(3, COLUMN_GAP, ROW_GAP);
-    wxFlexGridSizer *right_grid_sizer = new wxFlexGridSizer(3, COLUMN_GAP, ROW_GAP);
+
+    // The main extruder can carry a nozzle rack (H2C); non-rack printers keep the 3-column layout.
+    auto ns       = m_obj->GetNozzleSystem();
+    auto rack     = ns ? ns->GetNozzleRack() : nullptr;
+    bool has_rack = rack && rack->IsSupported();
+
+    wxFlexGridSizer *right_grid_sizer = new wxFlexGridSizer(has_rack ? 4 : 3, COLUMN_GAP, ROW_GAP);
     left_sizer->Add(left_grid_sizer);
     right_sizer->Add(right_grid_sizer);
 
@@ -567,29 +552,46 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
         auto k_title = new Label(m_multi_extruder_grid_panel, _L("Factor K"), 0, CALIBRATION_SAVE_NUMBER_INPUT_SIZE);
         k_title->SetFont(Label::Head_14);
         right_grid_sizer->Add(k_title, 1, wxALIGN_CENTER);
+
+        if (has_rack) {
+            auto nozzle_title = new Label(m_multi_extruder_grid_panel, _L("Nozzle ID"), 0, CALIBRATION_SAVE_NUMBER_INPUT_SIZE);
+            nozzle_title->SetFont(Label::Head_14);
+            right_grid_sizer->Add(nozzle_title, 1, wxALIGN_CENTER);
+        }
     }
 
-    std::vector<std::pair<int, std::string>> preset_names;
+    // key: (extruder_id, tray_id)
+    std::vector<std::pair<std::pair<int, int>, std::string>> preset_names;
     int i = 1;
     std::unordered_set<std::string> set;
     for (auto &info : m_obj->selected_cali_preset) {
         std::string default_name;
-        // extruder _id
+        // Derive extruder_id from the tray so the extruder/tray key stays consistent
+        // with the calibration result's extruder_id.
+        int extruder_id = 0;
+        if (info.tray_id == VIRTUAL_TRAY_MAIN_ID) {
+            extruder_id = 0;
+        } else if (info.tray_id == VIRTUAL_TRAY_DEPUTY_ID) {
+            extruder_id = 1;
+        } else {
+            int ams_id  = info.tray_id / 4;
+            extruder_id = m_obj->get_extruder_id_by_ams_id(std::to_string(ams_id));
+        }
         {
-            int extruder_id = 0;
-            if (info.tray_id == VIRTUAL_TRAY_MAIN_ID) {
-                extruder_id = 0;
-            } else if (info.tray_id == VIRTUAL_TRAY_DEPUTY_ID) {
-                extruder_id = 1;
-            } else {
-                int ams_id  = info.tray_id / 4;
-                extruder_id = m_obj->get_extruder_id_by_ams_id(std::to_string(ams_id));
-            }
-
-            if (extruder_id == 0) {
-                default_name += L("Right Nozzle");
-            } else if (extruder_id == 1){
-                default_name += L("Left Nozzle");
+            if (extruder_id == MAIN_EXTRUDER_ID) {
+                default_name += DevPrinterConfigUtil::get_toolhead_display_name(cwsp_pt, MAIN_EXTRUDER_ID, ToolHeadComponent::Nozzle, ToolHeadNameCase::TitleCase);
+                if (has_rack) {
+                    default_name += "_";
+                    if (info.nozzle_pos_id == 0) {
+                        default_name += "R";
+                    } else if (info.nozzle_pos_id >= 0x10) {
+                        default_name += std::to_string((info.nozzle_pos_id & 0x0f) + 1);
+                    } else {
+                        default_name += "N/A";
+                    }
+                }
+            } else if (extruder_id == DEPUTY_EXTRUDER_ID) {
+                default_name += DevPrinterConfigUtil::get_toolhead_display_name(cwsp_pt, DEPUTY_EXTRUDER_ID, ToolHeadComponent::Nozzle, ToolHeadNameCase::TitleCase);
             }
         }
 
@@ -614,7 +616,7 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
             }
         }
 
-        preset_names.push_back({info.tray_id, default_name});
+        preset_names.push_back({{extruder_id, info.tray_id}, default_name});
     }
 
     bool left_first_add_item = true;
@@ -648,14 +650,19 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
         tray_title->SetBitmap(*get_extruder_color_icon(full_filament_ams_list[item.tray_id].opt_string("filament_colour", 0u), tray_name.ToStdString(), FromDIP(20), FromDIP(20)));
         tray_title->SetToolTip("");
 
-        auto k_value = new GridTextInput(m_multi_extruder_grid_panel, "", "", CALIBRATION_SAVE_NUMBER_INPUT_SIZE, item.tray_id, GridTextInputType::K);
-        auto n_value = new GridTextInput(m_multi_extruder_grid_panel, "", "", CALIBRATION_SAVE_NUMBER_INPUT_SIZE, item.tray_id, GridTextInputType::N);
+        auto k_value = new GridTextInput(m_multi_extruder_grid_panel, "", "", CALIBRATION_SAVE_NUMBER_INPUT_SIZE, item.tray_id, GridTextInputType::K, item.extruder_id);
+        auto n_value = new GridTextInput(m_multi_extruder_grid_panel, "", "", CALIBRATION_SAVE_NUMBER_INPUT_SIZE, item.tray_id, GridTextInputType::N, item.extruder_id);
         k_value->GetTextCtrl()->SetValidator(wxTextValidator(wxFILTER_NUMERIC));
         n_value->GetTextCtrl()->SetValidator(wxTextValidator(wxFILTER_NUMERIC));
         auto k_value_failed = new Label(m_multi_extruder_grid_panel, _L("Failed"));
         auto n_value_failed = new Label(m_multi_extruder_grid_panel, _L("Failed"));
 
-        auto                              comboBox_tray_name = new GridComboBox(m_multi_extruder_grid_panel, CALIBRATION_SAVE_INPUT_SIZE, item.tray_id);
+        auto nozzle_id_value = new Label(m_multi_extruder_grid_panel, wxEmptyString);
+        nozzle_id_value->SetMinSize(wxSize(FromDIP(180), FromDIP(24)));
+        nozzle_id_value->Wrap(-1);
+        auto nozzle_id_failed = new Label(m_multi_extruder_grid_panel, _L("Failed"));
+
+        auto                              comboBox_tray_name = new GridComboBox(m_multi_extruder_grid_panel, CALIBRATION_SAVE_INPUT_SIZE, item.tray_id, item.extruder_id);
         auto                              tray_name_failed   = new Label(m_multi_extruder_grid_panel, " - ");
         wxArrayString                     selections;
         static std::vector<PACalibResult> filtered_results;
@@ -671,22 +678,26 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
         }
         comboBox_tray_name->Set(selections);
 
-        auto set_edit_mode = [this, k_value, n_value, k_value_failed, n_value_failed, comboBox_tray_name, tray_name_failed](std::string str) {
+        auto set_edit_mode = [this, k_value, n_value, k_value_failed, n_value_failed, nozzle_id_value, nozzle_id_failed, comboBox_tray_name, tray_name_failed](std::string str, bool display_nozzle) {
             if (str == "normal") {
                 comboBox_tray_name->Show();
                 tray_name_failed->Show(false);
                 k_value->Show();
                 n_value->Show();
+                nozzle_id_value->Show(display_nozzle);
                 k_value_failed->Show(false);
                 n_value_failed->Show(false);
+                nozzle_id_failed->Show(false);
             }
             if (str == "failed") {
                 comboBox_tray_name->Show(false);
                 tray_name_failed->Show();
                 k_value->Show(false);
                 n_value->Show(false);
+                nozzle_id_value->Show(false);
                 k_value_failed->Show();
                 n_value_failed->Show();
+                nozzle_id_failed->Show(display_nozzle);
             }
 
             // hide n value
@@ -698,15 +709,39 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
         };
 
         if (!result_failed) {
-            set_edit_mode("normal");
+            set_edit_mode("normal", has_rack && item.extruder_id == MAIN_EXTRUDER_ID);
 
             auto k_str = wxString::Format("%.3f", item.k_value);
             auto n_str = wxString::Format("%.3f", item.n_coef);
             k_value->GetTextCtrl()->SetValue(k_str);
             n_value->GetTextCtrl()->SetValue(n_str);
 
+            if (has_rack && item.extruder_id == MAIN_EXTRUDER_ID) {
+                wxString nozzle_id_str;
+                if (item.nozzle_pos_id == 0) {
+                    nozzle_id_str += "R | ";
+                } else if (item.nozzle_pos_id >= 0x10) {
+                    nozzle_id_str += wxString::Format("%d | ", (item.nozzle_pos_id & 0x0f) + 1);
+                } else {
+                    nozzle_id_str += "N/A | ";
+                    BOOST_LOG_TRIVIAL(warning) << __FUNCTION__ << "Nozzle position id is -1 or invalid.";
+                }
+                nozzle_id_str += wxString::Format("%.1f mm ", item.nozzle_diameter);
+                switch (item.nozzle_volume_type) {
+                case NozzleVolumeType::nvtStandard:    nozzle_id_str += _L("Standard Flow"); break;
+                case NozzleVolumeType::nvtHighFlow:    nozzle_id_str += _L("High Flow"); break;
+                case NozzleVolumeType::nvtTPUHighFlow: nozzle_id_str += _L("TPU High Flow"); break;
+                default: break;
+                }
+                nozzle_id_value->SetLabel(nozzle_id_str);
+            }
+
             for (auto &name : preset_names) {
-                if (item.tray_id == name.first) { comboBox_tray_name->SetValue(from_u8(name.second)); }
+                int extruder_id = name.first.first;
+                int tray_id     = name.first.second;
+                if (item.tray_id == tray_id && item.extruder_id == extruder_id) {
+                    comboBox_tray_name->SetValue(from_u8(name.second));
+                }
             }
 
             comboBox_tray_name->Bind(wxEVT_COMBOBOX, [this, comboBox_tray_name, k_value, n_value](auto &e) {
@@ -714,7 +749,7 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
                 auto history   = filtered_results[selection];
             });
         } else {
-            set_edit_mode("failed");
+            set_edit_mode("failed", has_rack && item.extruder_id == MAIN_EXTRUDER_ID);
         }
 
         if ((m_obj->is_main_extruder_on_left() && item.extruder_id == 0)
@@ -762,6 +797,14 @@ void CaliPASaveAutoPanel::sync_cali_result_for_multi_extruder(const std::vector<
             } else {
                 right_grid_sizer->Add(k_value_failed, 1, wxEXPAND);
             }
+
+            if (has_rack) {
+                if (nozzle_id_value->IsShown()) {
+                    right_grid_sizer->Add(nozzle_id_value, 1, wxEXPAND);
+                } else {
+                    right_grid_sizer->Add(nozzle_id_failed, 1, wxEXPAND);
+                }
+            }
         }
     }
 
diff --git a/src/slic3r/GUI/CalibrationWizardSavePage.hpp b/src/slic3r/GUI/CalibrationWizardSavePage.hpp
index 3233116d34..4726cb1230 100644
--- a/src/slic3r/GUI/CalibrationWizardSavePage.hpp
+++ b/src/slic3r/GUI/CalibrationWizardSavePage.hpp
@@ -107,7 +107,10 @@ protected:
     wxPanel* m_part_failed_panel;
     wxPanel*    m_grid_panel{ nullptr };
     wxPanel*    m_multi_extruder_grid_panel{ nullptr };
-    std::map<int, PACalibResult> m_calib_results;// map<tray_id, PACalibResult>
+    // keyed by (tray_id, extruder_id): the same tray_id can appear under two
+    // extruders (rack / dual-address configs), so a tray_id-only map would
+    // silently overwrite one extruder's K/N.
+    std::vector<PACalibResult> m_calib_results;
     std::vector<PACalibResult> m_history_results;
     bool m_is_all_failed{ true };
     MachineObject* m_obj{ nullptr };
diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index 9d7afd13b9..ddf6166d11 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -23,6 +23,7 @@
 #include "fast_float/fast_float.h"
 
 #include "DeviceCore/DevFilaSystem.h"
+#include "DeviceCore/DevFilaSwitch.h"
 #include "DeviceCore/DevExtensionTool.h"
 #include "DeviceCore/DevExtruderSystem.h"
 #include "DeviceCore/DevNozzleSystem.h"
@@ -39,6 +40,7 @@
 #include "DeviceCore/DevHMS.h"
 
 #include "DeviceCore/DevMapping.h"
+#include "DeviceCore/DevMappingNozzle.h"
 #include "DeviceCore/DevManager.h"
 #include "DeviceCore/DevUtil.h"
 
@@ -567,11 +569,14 @@ MachineObject::MachineObject(DeviceManager* manager, NetworkAgent* agent, std::s
         m_extension_tool = DevExtensionTool::Create(this);
         m_nozzle_system = new DevNozzleSystem(this);
         m_fila_system   = new DevFilaSystem(this);
+        m_fila_switch   = new DevFilaSwitch(this);
         m_hms_system    = new DevHMS(this);
         m_config = new DevConfig(this);
 
         m_ctrl = new DevCtrl(this);
         m_print_options = new DevPrintOptions(this);
+
+        m_nozzle_mapping_ptr = std::make_shared<DevNozzleMappingCtrl>(this);
     }
 }
 
@@ -615,6 +620,9 @@ MachineObject::~MachineObject()
         delete m_fila_system;
         m_fila_system = nullptr;
 
+        delete m_fila_switch;
+        m_fila_switch = nullptr;
+
         delete m_hms_system;
         m_hms_system = nullptr;
 
@@ -862,6 +870,9 @@ void MachineObject::clear_version_info()
     cutting_module_version_info = DevFirmwareVersionInfo();
     extinguish_version_info = DevFirmwareVersionInfo();
     module_vers.clear();
+    // Drop cached rack-hotend (WTM) firmware alongside the module list.
+    // Inert for non-rack printers (rack firmware map is empty).
+    m_nozzle_system->ClearFirmwareInfoWTM();
 }
 
 void MachineObject::store_version_info(const DevFirmwareVersionInfo& info)
@@ -874,6 +885,11 @@ void MachineObject::store_version_info(const DevFirmwareVersionInfo& info)
         cutting_module_version_info = info;
     } else if (info.isExtinguishSystem()) {
         extinguish_version_info = info;
+    } else if (info.isWTM()) {
+        // Route rack-hotend / extruder-nozzle firmware into the nozzle system so
+        // the rack upgrade UI can read per-nozzle versions. isWTM() is false for every non-rack
+        // printer's modules, so this branch never fires outside H2C.
+        m_nozzle_system->AddFirmwareInfoWTM(info);
     }
 
     module_vers.emplace(info.name, info);
@@ -1976,6 +1992,10 @@ int MachineObject::command_set_pa_calibration(const std::vector<PACalibResult> &
                 j["print"]["filaments"][i]["n_coef"] = std::to_string(pa_calib_values[i].n_coef);
             else
                 j["print"]["filaments"][i]["n_coef"]  = "0.0";
+            if (pa_calib_values[i].nozzle_pos_id >= 0) {
+                j["print"]["filaments"][i]["nozzle_pos"] = pa_calib_values[i].nozzle_pos_id;
+                j["print"]["filaments"][i]["nozzle_sn"]  = pa_calib_values[i].nozzle_sn;
+            }
         }
 
         BOOST_LOG_TRIVIAL(info) << "extrusion_cali_set: " << j.dump();
@@ -1994,6 +2014,10 @@ int MachineObject::command_delete_pa_calibration(const PACalibIndexInfo& pa_cali
     j["print"]["nozzle_id"]       = _generate_nozzle_id(pa_calib.nozzle_volume_type, to_string_nozzle_diameter(pa_calib.nozzle_diameter)).ToStdString();
     j["print"]["filament_id"]     = pa_calib.filament_id;
     j["print"]["cali_idx"]        = pa_calib.cali_idx;
+    if (pa_calib.nozzle_pos_id >= 0) {
+        j["print"]["nozzle_pos"] = pa_calib.nozzle_pos_id;
+        j["print"]["nozzle_sn"]  = pa_calib.nozzle_sn;
+    }
     j["print"]["nozzle_diameter"] = to_string_nozzle_diameter(pa_calib.nozzle_diameter);
 
     BOOST_LOG_TRIVIAL(info) << "extrusion_cali_del: " << j.dump();
@@ -2014,6 +2038,11 @@ int MachineObject::command_get_pa_calibration_tab(const PACalibExtruderInfo &cal
         j["print"]["nozzle_id"] = _generate_nozzle_id(calib_info.nozzle_volume_type, to_string_nozzle_diameter(calib_info.nozzle_diameter)).ToStdString();
     j["print"]["nozzle_diameter"] = to_string_nozzle_diameter(calib_info.nozzle_diameter);
 
+    if (calib_info.nozzle_pos_id >= 0) {
+        j["print"]["nozzle_pos"] = calib_info.nozzle_pos_id;
+        j["print"]["nozzle_sn"]  = calib_info.nozzle_sn;
+    }
+
     BOOST_LOG_TRIVIAL(info) << "extrusion_cali_get: " << j.dump();
     request_tab_from_bbs = true;
     return this->publish_json(j);
@@ -2040,6 +2069,10 @@ int MachineObject::commnad_select_pa_calibration(const PACalibIndexInfo& pa_cali
     j["print"]["slot_id"]         = pa_calib_info.slot_id;
     j["print"]["cali_idx"]        = pa_calib_info.cali_idx;
     j["print"]["filament_id"]     = pa_calib_info.filament_id;
+    if (pa_calib_info.nozzle_pos_id >= 0) {
+        j["print"]["nozzle_pos"] = pa_calib_info.nozzle_pos_id;
+        j["print"]["nozzle_sn"]  = pa_calib_info.nozzle_sn;
+    }
     j["print"]["nozzle_diameter"] = to_string_nozzle_diameter(pa_calib_info.nozzle_diameter);
 
     BOOST_LOG_TRIVIAL(info) << "extrusion_cali_sel: " << j.dump();
@@ -2379,6 +2412,7 @@ void MachineObject::reset()
     jobState_ = 0;
     m_plate_index = -1;
     device_cert_installed = false;
+    clear_auto_nozzle_mapping();// reset nozzle mapping
 
     // reset print_json
     json empty_j;
@@ -2896,6 +2930,7 @@ int MachineObject::parse_json(std::string tunnel, std::string payload, bool key_
                 }
 
               m_fan->ParseV2_0(jj);
+                m_fila_switch->ParseFilaSwitchInfo(jj);
 
                 if (jj.contains("support_filament_backup")) {
                     if (jj["support_filament_backup"].is_boolean()) {
@@ -3000,6 +3035,8 @@ int MachineObject::parse_json(std::string tunnel, std::string payload, bool key_
 
 
             if (jj.contains("command")) {
+                m_nozzle_mapping_ptr->ParseAutoNozzleMapping(jj);
+
                 if (jj["command"].get<std::string>() == "ams_change_filament") {
                     if (jj.contains("errno")) {
                         if (jj["errno"].is_number()) {
@@ -4082,6 +4119,14 @@ int MachineObject::parse_json(std::string tunnel, std::string payload, bool key_
                                         pa_calib_result.nozzle_volume_type = convert_to_nozzle_type((*it)["nozzle_id"].get<std::string>());
                                     }
 
+                                    if ((*it).contains("nozzle_pos")) {
+                                        pa_calib_result.nozzle_pos_id = (*it)["nozzle_pos"].get<int>();
+                                    }
+
+                                    if ((*it).contains("nozzle_sn")) {
+                                        pa_calib_result.nozzle_sn = (*it)["nozzle_sn"].get<std::string>();
+                                    }
+
                                     if (jj["nozzle_diameter"].is_number_float()) {
                                         pa_calib_result.nozzle_diameter = jj["nozzle_diameter"].get<float>();
                                     } else if (jj["nozzle_diameter"].is_string()) {
@@ -4179,6 +4224,14 @@ int MachineObject::parse_json(std::string tunnel, std::string payload, bool key_
                                     pa_calib_result.nozzle_volume_type = NozzleVolumeType::nvtStandard;
                                 }
 
+                                if (it->contains("nozzle_pos")) {
+                                    pa_calib_result.nozzle_pos_id = (*it)["nozzle_pos"].get<int>();
+                                }
+
+                                if (it->contains("nozzle_sn")) {
+                                    pa_calib_result.nozzle_sn = (*it)["nozzle_sn"].get<std::string>();
+                                }
+
                                 if ((*it)["k_value"].is_number_float())
                                     pa_calib_result.k_value = (*it)["k_value"].get<float>();
                                 else if ((*it)["k_value"].is_string())
@@ -5004,6 +5057,7 @@ void MachineObject::parse_new_info(json print)
         is_support_user_preset = get_flag_bits(fun, 11);
         is_support_door_open_check = get_flag_bits(fun, 12);
         is_support_nozzle_blob_detection = get_flag_bits(fun, 13);
+        m_nozzle_system->SetSupportNozzleRack(get_flag_bits(fun, 60)); // H2C hotend rack support (device-side gate for the sync dialog)
         is_support_upgrade_kit = get_flag_bits(fun, 14);
         is_support_internal_timelapse = get_flag_bits(fun, 28);
         m_support_mqtt_homing = get_flag_bits(fun, 32);
@@ -5066,7 +5120,10 @@ void MachineObject::parse_new_info(json print)
 
         DevBed::ParseV2_0(device,m_bed);
 
-        if (device.contains("nozzle")) {  DevNozzleSystemParser::ParseV2_0(device["nozzle"], m_nozzle_system); }
+        // Pass the whole device json: ParseV2_0 reads ext/rack nozzles from device["nozzle"] and the
+        // hotend-rack state from device["holder"] (rack data lives outside device["nozzle"]). It is a
+        // no-op for devices that report neither key, so non-rack machines are unaffected.
+        DevNozzleSystemParser::ParseV2_0(device, m_nozzle_system);
         if (device.contains("extruder")) { ExtderSystemParser::ParseV2_0(device["extruder"], m_extder_system);}
         if (device.contains("ext_tool")) { DevExtensionToolParser::ParseV2_0(device["ext_tool"], m_extension_tool); }
 
diff --git a/src/slic3r/GUI/DeviceManager.hpp b/src/slic3r/GUI/DeviceManager.hpp
index 0a31c18502..9bb00dfcab 100644
--- a/src/slic3r/GUI/DeviceManager.hpp
+++ b/src/slic3r/GUI/DeviceManager.hpp
@@ -83,10 +83,12 @@ class DevExtensionTool;
 class DevExtderSystem;
 class DevFan;
 class DevFilaSystem;
+class DevFilaSwitch;
 class DevPrintOptions;
 class DevHMS;
 class DevLamp;
 class DevNozzleSystem;
+class DevNozzleMappingCtrl;
 class DeviceManager;
 class DevStorage;
 struct DevPrintTaskRatingInfo;
@@ -115,6 +117,7 @@ private:
     DevExtderSystem*  m_extder_system;
     DevNozzleSystem*  m_nozzle_system;
     DevFilaSystem*    m_fila_system;
+    DevFilaSwitch*    m_fila_switch;
     DevFan*           m_fan;
     DevBed *          m_bed;
     DevStorage*       m_storage;
@@ -131,6 +134,11 @@ private:
     /*Config*/
     DevConfig* m_config;
 
+    /* print-dispatch nozzle mapping (H2C hotend rack). Created unconditionally in the ctor so
+       get_nozzle_mapping_result() is always valid; stays empty (no result attached) for every
+       non-rack printer. */
+    std::shared_ptr<DevNozzleMappingCtrl> m_nozzle_mapping_ptr;
+
 public:
     MachineObject(DeviceManager* manager, NetworkAgent* agent, std::string name, std::string id, std::string ip);
     ~MachineObject();
@@ -329,7 +337,12 @@ public:
 
     DevNozzleSystem* GetNozzleSystem() const { return m_nozzle_system;}
 
+    /* print-dispatch nozzle mapping (H2C hotend rack); result stays empty for non-rack printers */
+    std::shared_ptr<DevNozzleMappingCtrl> get_nozzle_mapping_result() const { return m_nozzle_mapping_ptr; }
+    void clear_auto_nozzle_mapping();// defined in DevMappingNozzle.cpp
+
     DevFilaSystem*   GetFilaSystem() const { return m_fila_system;}
+    DevFilaSwitch*   GetFilaSwitch() const { return m_fila_switch;}
     bool             HasAms() const;
 
     DevLamp*         GetLamp() const { return m_lamp; }
diff --git a/src/slic3r/GUI/DeviceTab/CMakeLists.txt b/src/slic3r/GUI/DeviceTab/CMakeLists.txt
index 40f192ef4e..1438bf139b 100644
--- a/src/slic3r/GUI/DeviceTab/CMakeLists.txt
+++ b/src/slic3r/GUI/DeviceTab/CMakeLists.txt
@@ -4,5 +4,15 @@ list(APPEND SLIC3R_GUI_SOURCES
     GUI/DeviceTab/uiAmsHumidityPopup.cpp
     GUI/DeviceTab/uiDeviceUpdateVersion.h
     GUI/DeviceTab/uiDeviceUpdateVersion.cpp
+    GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.h
+    GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.cpp
+    GUI/DeviceTab/wgtDeviceNozzleRack.h
+    GUI/DeviceTab/wgtDeviceNozzleRack.cpp
+    GUI/DeviceTab/wgtDeviceNozzleRackUpdate.h
+    GUI/DeviceTab/wgtDeviceNozzleRackUpdate.cpp
+    GUI/DeviceTab/wgtDeviceNozzleSelect.h
+    GUI/DeviceTab/wgtDeviceNozzleSelect.cpp
+    GUI/DeviceTab/wgtMsgBox.h
+    GUI/DeviceTab/wgtMsgBox.cpp
 )
 set(SLIC3R_GUI_SOURCES ${SLIC3R_GUI_SOURCES} PARENT_SCOPE)
\ No newline at end of file
diff --git a/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.cpp b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.cpp
new file mode 100644
index 0000000000..e8fbf37d15
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.cpp
@@ -0,0 +1,700 @@
+//**********************************************************/
+/* File: wgtDeviceNozzleRack.cpp
+*  Description: The Device-tab panel with the toolhead nozzle and the H2C induction hotend rack.
+*
+*  \n class wgtDeviceNozzleRack;
+*  \n class wgtDeviceNozzleRackToolHead;
+*  \n class wgtDeviceNozzleRackArea;
+*  \n class wgtDeviceNozzleRackPos;
+*
+*  The wgtDeviceNozzleRackNozzleItem tile and the EVT_NOZZLE_RACK_NOZZLE_ITEM_SELECTED event live in
+*  wgtDeviceNozzleRackNozzleItem.{h,cpp}, so they are not redefined here.
+//**********************************************************/
+
+#include "wgtDeviceNozzleRack.h"
+#include "wgtDeviceNozzleRackUpdate.h"
+
+#include "slic3r/GUI/DeviceCore/DevNozzleSystem.h"
+
+#include "slic3r/GUI/I18N.hpp"
+#include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/MainFrame.hpp"
+#include "slic3r/GUI/wxExtensions.hpp"
+
+#include "slic3r/GUI/Widgets/Button.hpp"
+#include "slic3r/GUI/Widgets/Label.hpp"
+
+#define WX_DIP_SIZE(x, y) wxSize(FromDIP(x), FromDIP(y))
+
+#define L_RAW_A_STR _L("Row A")
+#define L_RAW_B_STR _L("Row B")
+
+// Orca: StateColor lacks these grey constants, so mirror the values here.
+static const wxColour WGT_GREY200 = wxColour(248, 248, 248);
+static const wxColour WGT_GREY300 = wxColour(238, 238, 238);
+
+static wxColour s_hgreen_clr("#00AE42");
+
+namespace Slic3r::GUI
+{
+
+// Tints the "yellow" template pixels of a nozzle bitmap with the loaded filament colour.
+// Duplicates the file-local helper of the same purpose in wgtDeviceNozzleRackNozzleItem.cpp.
+static wxBitmap SetNozzleBmpColor(const wxBitmap& bmp, const std::string& color_str) {
+    if(color_str.empty()) return bmp;
+
+    wxImage img = bmp.ConvertToImage();
+    wxColour color("#" + color_str);
+
+    for (int y = 0; y < img.GetHeight(); ++y) {
+        for (int x = 0; x < img.GetWidth(); ++x) {
+            unsigned char r = img.GetRed(x, y);
+            unsigned char g = img.GetGreen(x, y);
+            unsigned char b = img.GetBlue(x, y);
+
+            /*replace yellow with color*/
+            if ( r >= 180 && g >= 180 && b <= 150) {
+                img.SetRGB(x, y, color.Red(), color.Green(), color.Blue());
+            }
+        }
+    }
+
+    return wxBitmap(img, -1, bmp.GetScaleFactor());
+}
+
+// Orca: StateColor has no gray button style, so define one file-local. This panel is its only
+// consumer, so keeping it here avoids touching the shared StateColor widget.
+static StateColor s_button_style_gray()
+{
+    return StateColor(std::pair<wxColour, int>(wxColour(206, 206, 206), StateColor::Pressed),
+                      std::pair<wxColour, int>(*wxWHITE, StateColor::Focused),
+                      std::pair<wxColour, int>(wxColour(238, 238, 238), StateColor::Hovered),
+                      std::pair<wxColour, int>(*wxWHITE, StateColor::Normal));
+}
+
+wgtDeviceNozzleRack::wgtDeviceNozzleRack(wxWindow* parent, wxWindowID id, const wxPoint& pos, const wxSize& size, long style)
+    : wxPanel(parent, id, pos, size, style)
+{
+    CreateGui();
+}
+
+void wgtDeviceNozzleRack::CreateGui()
+{
+    m_toolhead_panel = new wgtDeviceNozzleRackToolHead(this);
+    m_rack_area = new wgtDeviceNozzleRackArea(this);
+
+    wxPanel* separator = new wxPanel(this);
+    separator->SetMaxSize(wxSize(FromDIP(1), -1));
+    separator->SetMinSize(wxSize(FromDIP(1), -1));
+    separator->SetBackgroundColour(WGT_GREY300);
+
+    wxSizer* main_sizer = new wxBoxSizer(wxHORIZONTAL);
+    main_sizer->AddStretchSpacer();
+    main_sizer->Add(m_toolhead_panel, 0, wxEXPAND);
+    main_sizer->Add(separator, 0, wxEXPAND);
+    main_sizer->Add(m_rack_area, 0, wxEXPAND);
+    main_sizer->AddStretchSpacer();
+
+    SetSizer(main_sizer);
+    SetMaxSize(WX_DIP_SIZE(586, -1));
+    SetMinSize(WX_DIP_SIZE(586, -1));
+    SetSize(WX_DIP_SIZE(586, -1));
+    Layout();
+
+    wxGetApp().UpdateDarkUIWin(this);
+}
+
+void wgtDeviceNozzleRack::UpdateRackInfo(std::shared_ptr<DevNozzleRack> rack)
+{
+    if (!rack->IsSupported()) { return; }
+
+    m_nozzle_rack = rack;
+    if (m_nozzle_rack.expired()) { return; }
+
+    DevNozzleSystem* nozzle_system = m_nozzle_rack.lock()->GetNozzleSystem();
+    if (nozzle_system)
+    {
+        m_toolhead_panel->UpdateToolHeadInfo(nozzle_system->GetExtNozzle(MAIN_EXTRUDER_ID));
+        m_rack_area->UpdateRackInfo(m_nozzle_rack);
+    }
+}
+
+void wgtDeviceNozzleRack::Rescale()
+{
+    m_toolhead_panel->Rescale();
+    m_rack_area->Rescale();
+    Layout();
+}
+
+class wgtDeviceNozzleRackTitle : public StaticBox
+{
+public:
+    wgtDeviceNozzleRackTitle(wxWindow* parent, const wxString& title) : StaticBox(parent)
+    {
+        SetBackgroundColour(WGT_GREY200);
+        SetBorderColor(*wxWHITE);
+        SetCornerRadius(0);
+
+        m_title_label = new Label(this, title);
+        m_title_label->SetFont(Label::Body_14);
+        m_title_label->SetBackgroundColour(WGT_GREY200);
+
+        wxSizer* title_sizer = new wxBoxSizer(wxHORIZONTAL);
+        title_sizer->AddStretchSpacer();
+        title_sizer->Add(m_title_label, 0, wxEXPAND | wxALIGN_CENTER | wxTOP | wxBOTTOM, FromDIP(5));
+        title_sizer->AddStretchSpacer();
+        SetSizer(title_sizer);
+    };
+
+public:
+    void SetLabel(const wxString& new_label) { m_title_label->SetLabel(new_label); }
+
+private:
+    Label* m_title_label;
+};
+
+
+void wgtDeviceNozzleRackToolHead::CreateGui()
+{
+    wxBoxSizer* mainSizer = new wxBoxSizer(wxVERTICAL);
+
+    // Create Header
+    wgtDeviceNozzleRackTitle* title_box = new wgtDeviceNozzleRackTitle(this, _L("Toolhead"));
+    mainSizer->Add(title_box, 0, wxEXPAND | wxTOP);
+    mainSizer->AddStretchSpacer();
+
+    // Image
+    m_extruder_nozzle_empty = new ScalableBitmap(this, "dev_rack_toolhead_empty", 98);
+    m_extruder_nozzle_normal = new ScalableBitmap(this, "dev_rack_toolhead_normal", 98);
+    m_toolhead_icon = new wxStaticBitmap(this, wxID_ANY, m_extruder_nozzle_empty->bmp(), wxDefaultPosition, WX_DIP_SIZE(98, 98));
+    mainSizer->Add(m_toolhead_icon, 0, wxALIGN_CENTRE_HORIZONTAL | wxTOP, FromDIP(20));
+
+    // Nozzle info
+    m_nozzle_diamenter_label = new Label(this);
+    m_nozzle_diamenter_label->SetFont(Label::Body_13);
+    m_nozzle_diamenter_label->SetBackgroundColour(*wxWHITE);
+    mainSizer->Add(m_nozzle_diamenter_label, 0, wxALIGN_CENTRE_HORIZONTAL | wxBOTTOM | wxTOP, FromDIP(5));
+
+    m_nozzle_flowtype_label = new Label(this);
+    m_nozzle_flowtype_label->SetFont(Label::Body_13);
+    m_nozzle_flowtype_label->SetBackgroundColour(*wxWHITE);
+    mainSizer->Add(m_nozzle_flowtype_label, 0, wxALIGN_CENTRE_HORIZONTAL);
+    mainSizer->AddStretchSpacer();
+
+    // Set sizer
+    SetSizer(mainSizer);
+    SetMaxSize(WX_DIP_SIZE(132, -1));
+    SetMinSize(WX_DIP_SIZE(132, -1));
+    SetSize(WX_DIP_SIZE(132, -1));
+}
+
+void wgtDeviceNozzleRackToolHead::UpdateToolHeadInfo(const DevNozzle& extruder_nozzle)
+{
+    /* Labels */
+    if (extruder_nozzle.IsEmpty())
+    {
+        m_nozzle_diamenter_label->Show(false);
+        m_nozzle_flowtype_label->SetLabel(_L("Empty"));
+    }
+    else if (extruder_nozzle.IsUnknown())
+    {
+        m_nozzle_diamenter_label->Show(false);
+        m_nozzle_flowtype_label->SetLabel(_L("Unknown"));
+    }
+    else if (extruder_nozzle.IsAbnormal())
+    {
+        m_nozzle_diamenter_label->Show(false);
+        m_nozzle_flowtype_label->SetLabel(_L("Error"));
+    }
+    else /*extruder_nozzle.IsNormal()*/
+    {
+        m_nozzle_diamenter_label->Show(true);
+        m_nozzle_diamenter_label->SetLabel(extruder_nozzle.GetNozzleDiameterStr());
+        m_nozzle_flowtype_label->SetLabel(extruder_nozzle.GetNozzleFlowTypeStr());
+    }
+
+    /* Icon*/
+    bool extruder_exist = !extruder_nozzle.IsEmpty();
+    if (m_extruder_nozzle_exist != extruder_exist)
+    {
+        m_extruder_nozzle_exist = extruder_exist;
+        m_filament_color = extruder_nozzle.GetFilamentColor();
+        m_toolhead_icon->SetBitmap(m_extruder_nozzle_exist ? SetNozzleBmpColor(m_extruder_nozzle_normal->bmp(), m_filament_color) : m_extruder_nozzle_empty->bmp());
+        m_toolhead_icon->Refresh();
+    }
+}
+
+void wgtDeviceNozzleRackToolHead::Rescale()
+{
+    m_extruder_nozzle_normal->msw_rescale();
+    m_extruder_nozzle_empty->msw_rescale();
+    m_toolhead_icon->SetBitmap(m_extruder_nozzle_exist ? SetNozzleBmpColor(m_extruder_nozzle_normal->bmp(), m_filament_color) : m_extruder_nozzle_empty->bmp());
+
+    Layout();
+    Refresh();
+}
+
+void wgtDeviceNozzleRackArea::CreateGui()
+{
+    wxSizer* main_sizer = new wxBoxSizer(wxVERTICAL);
+
+    // Create Header
+    m_title_nozzle_rack = new wgtDeviceNozzleRackTitle(this, _L("Induction Hotend Rack"));
+    main_sizer->Add(m_title_nozzle_rack, 0, wxEXPAND | wxTOP);
+
+    // Create Simple Book
+    m_simple_book = new wxSimplebook(this, wxID_ANY);
+
+    wxSizer* content_sizer = new wxBoxSizer(wxVERTICAL);
+
+    m_panel_content = new wxPanel(m_simple_book, wxID_ANY);
+    m_panel_refresh = new wxPanel(m_simple_book, wxID_ANY);
+
+    // Create Hotends ans Rack Position Panel
+    wxSizer* hotends_rack_sizer = new wxBoxSizer(wxHORIZONTAL);
+
+    // Hotends
+    m_hotends_sizer = new wxBoxSizer(wxVERTICAL);
+    m_arow_nozzles_box = CreateNozzleBox( { 0, 2, 4});
+    m_brow_nozzles_box = CreateNozzleBox( { 1, 3, 5});
+    m_hotends_sizer->Add(m_arow_nozzles_box);
+    m_hotends_sizer->Add(m_brow_nozzles_box);
+    hotends_rack_sizer->Add(m_hotends_sizer, 0, wxLEFT, FromDIP(8));
+
+    // Rack
+    m_rack_pos_panel = new wgtDeviceNozzleRackPos(m_panel_content);
+    hotends_rack_sizer->Add(m_rack_pos_panel, 0, wxEXPAND);
+    content_sizer->Add(hotends_rack_sizer, 0);
+
+    wxSizer* btn_sizer = new wxBoxSizer(wxHORIZONTAL);
+    m_btn_hotends_infos = new Button(m_panel_content, _L("Hotends Info"));
+    m_btn_hotends_infos->SetFont(Label::Body_12);
+    m_btn_hotends_infos->SetBackgroundColor(s_button_style_gray());
+    m_btn_hotends_infos->SetBackgroundColour(*wxWHITE);
+    m_btn_hotends_infos->Bind(wxEVT_BUTTON, &wgtDeviceNozzleRackArea::OnBtnHotendsInfos, this);
+
+    m_btn_read_all = new Button(m_panel_content, _L("Read All"));
+    m_btn_read_all->SetFont(Label::Body_12);
+    m_btn_read_all->SetBackgroundColor(s_button_style_gray());
+    m_btn_read_all->SetBackgroundColour(*wxWHITE);
+    m_btn_read_all->Bind(wxEVT_BUTTON, &wgtDeviceNozzleRackArea::OnBtnReadAll, this);
+
+    btn_sizer->Add(m_btn_hotends_infos, 0, wxLEFT);
+    btn_sizer->Add(m_btn_read_all, 0, wxLEFT, FromDIP(5));
+    content_sizer->Add(btn_sizer, 0, wxLEFT, FromDIP(10));
+
+    /* refresh panel */
+    wxSizer* refresh_sizer = CreateRefreshBook(m_panel_refresh);
+
+    m_panel_content->SetSizer(content_sizer);
+    m_panel_refresh->SetSizer(refresh_sizer);
+    m_simple_book->AddPage(m_panel_content, "Content");
+    m_simple_book->AddPage(m_panel_refresh, "Refresh");
+    main_sizer->Add(m_simple_book, 1, wxEXPAND);
+
+    m_simple_book->SetSelection(0);
+
+    SetSizer(main_sizer);
+    Layout();
+    Fit();
+}
+
+wxSizer* wgtDeviceNozzleRackArea::CreateRefreshBook(wxPanel* parent)
+{
+    wxSizer* refresh_sizer = new wxBoxSizer(wxVERTICAL);
+
+    std::vector<std::string> list{"ams_rfid_1", "ams_rfid_2", "ams_rfid_3", "ams_rfid_4"};
+    m_refresh_icon = new AnimaIcon(parent, wxID_ANY, list, "refresh_printer", 100);
+    m_refresh_icon->SetMinSize(wxSize(FromDIP(25), FromDIP(25)));
+
+    wxSizer* progress_sizer = new wxBoxSizer(wxHORIZONTAL);
+
+    Label* progress_prefix = new Label(parent, _L("Reading "));
+    progress_prefix->SetBackgroundColour(*wxWHITE);
+    m_progress_refresh = new Label(parent, "(1/6)");
+    m_progress_refresh->SetFont(Label::Body_14);
+    m_progress_refresh->SetBackgroundColour(*wxWHITE);
+    m_progress_refresh->SetForegroundColour(*wxGREEN);
+    Label* progress_suffix = new Label(parent, " ...");
+    progress_suffix->SetBackgroundColour(*wxWHITE);
+
+    progress_sizer->Add(progress_prefix, 0, wxLEFT);
+    progress_sizer->Add(m_progress_refresh, 0, wxLEFT);
+    progress_sizer->Add(progress_suffix, 0, wxLEFT);
+
+    Label* refresh_tip = new Label(parent, _L("Please wait"));
+    refresh_tip->SetBackgroundColour(*wxWHITE);
+
+    refresh_sizer->Add(0, 0, 1, wxEXPAND, 0);
+    refresh_sizer->Add(m_refresh_icon, 0, wxALIGN_CENTER_HORIZONTAL, 0);
+    refresh_sizer->Add(progress_sizer, 0, wxALIGN_CENTER_HORIZONTAL, FromDIP(0));
+    refresh_sizer->Add(refresh_tip, 0, wxALIGN_CENTER_HORIZONTAL, FromDIP(0));
+    refresh_sizer->Add(0, 0, 1, wxEXPAND, 0);
+
+    return refresh_sizer;
+}
+
+StaticBox* wgtDeviceNozzleRackArea::CreateNozzleBox(const std::vector<int> nozzle_idxes)
+{
+    StaticBox* nozzle_box = new StaticBox(m_panel_content);
+    nozzle_box->SetBackgroundColor(*wxWHITE);
+    nozzle_box->SetBorderColor(*wxWHITE);
+    nozzle_box->SetCornerRadius(0);
+
+    wxSizer* h_sizer = new wxBoxSizer(wxHORIZONTAL);
+    for (auto start_idx : nozzle_idxes)
+    {
+        wgtDeviceNozzleRackNozzleItem* nozzle_item = new wgtDeviceNozzleRackNozzleItem(nozzle_box, start_idx);
+        m_nozzle_items[start_idx] = nozzle_item;
+        h_sizer->Add(nozzle_item, 0, wxALL, FromDIP(8));
+    }
+
+    nozzle_box->SetSizer(h_sizer);
+    return nozzle_box;
+}
+
+void wgtDeviceNozzleRackArea::UpdateNozzleItems(const std::unordered_map<int, wgtDeviceNozzleRackNozzleItem*>& nozzle_items,
+    std::shared_ptr<DevNozzleRack> nozzle_rack)
+{
+    for (auto iter : nozzle_items)
+    {
+        iter.second->Update(nozzle_rack);
+    }
+
+    /*update nozzle possition and background*/
+    if (nozzle_rack->GetReadingCount() != 0)
+    {
+        m_progress_refresh->SetLabel(wxString::Format("(%d/%d)", nozzle_rack->GetReadingIdx(), nozzle_rack->GetReadingCount()));
+        if(!m_refresh_icon->IsPlaying()) {
+            m_simple_book->SetSelection(1);
+            m_refresh_icon->Play();
+        }
+        return;
+    } else{
+        m_refresh_icon->Stop();
+        m_simple_book->SetSelection(0);
+    }
+
+    const DevNozzleRack::RackPos new_pos = nozzle_rack->GetPosition();
+    const DevNozzleRack::RackStatus new_status = nozzle_rack->GetStatus();
+    if (m_rack_pos != new_pos || m_rack_status != new_status)
+    {
+        m_rack_pos = new_pos;
+        m_rack_status = new_status;
+        if (m_rack_status == DevNozzleRack::RACK_STATUS_IDLE)
+        {
+            m_hotends_sizer->Clear();
+            if (m_rack_pos == DevNozzleRack::RACK_POS_B_TOP)
+            {
+                m_hotends_sizer->Add(m_brow_nozzles_box);
+                m_hotends_sizer->Add(m_arow_nozzles_box);
+            }
+            else if (m_rack_pos == DevNozzleRack::RACK_POS_A_TOP)
+            {
+                m_hotends_sizer->Add(m_arow_nozzles_box);
+                m_hotends_sizer->Add(m_brow_nozzles_box);
+            }
+            else
+            {
+                m_hotends_sizer->Add(m_arow_nozzles_box);
+                m_hotends_sizer->Add(m_brow_nozzles_box);
+            }
+        }
+    }
+}
+
+void wgtDeviceNozzleRackArea::UpdateRackInfo(std::weak_ptr<DevNozzleRack> rack)
+{
+    m_nozzle_rack = rack;
+    const auto& nozzle_rack = rack.lock();
+    if (nozzle_rack)
+    {
+        UpdateNozzleItems(m_nozzle_items, nozzle_rack);
+        m_rack_pos_panel->UpdateRackPos(nozzle_rack);
+        m_btn_read_all->Enable(nozzle_rack->CtrlCanReadAll());
+    }
+
+    if (m_rack_upgrade_dlg && m_rack_upgrade_dlg->IsShown())
+    {
+        m_rack_upgrade_dlg->UpdateRackInfo(nozzle_rack);
+    }
+};
+
+void wgtDeviceNozzleRackArea::OnBtnHotendsInfos(wxCommandEvent& evt)
+{
+    const auto& nozzle_rack = m_nozzle_rack.lock();
+    if (nozzle_rack)
+    {
+        m_rack_upgrade_dlg = new wgtDeviceNozzleRackUpgradeDlg((wxWindow*)wxGetApp().mainframe, nozzle_rack);
+        m_rack_upgrade_dlg->ShowModal();
+
+        delete m_rack_upgrade_dlg;
+        m_rack_upgrade_dlg = nullptr;
+    }
+
+    evt.Skip();
+}
+
+void wgtDeviceNozzleRackArea::OnBtnReadAll(wxCommandEvent& evt)
+{
+    if (const auto nozzle_rack = m_nozzle_rack.lock())
+    {
+        nozzle_rack->CtrlRackReadAll(true);
+    }
+
+    evt.Skip();
+}
+
+void wgtDeviceNozzleRackArea::Rescale()
+{
+    for (auto item : m_nozzle_items)
+    {
+        item.second->Rescale();
+    }
+
+    m_rack_pos_panel->Rescale();
+    m_btn_hotends_infos->Rescale();
+    m_btn_read_all->Rescale();
+}
+
+static void s_set_bg_style(StaticBox* box,
+    ScalableButton* btn,
+    Label* label_row,
+    Label* label_row_status,
+    const wxColour& clr)
+{
+    box->SetBorderColor(clr);
+    box->SetBackgroundColor(clr);
+    btn->SetBackgroundColour(clr);
+    label_row->SetBackgroundColour(clr);
+    label_row_status->SetBackgroundColour(clr);
+}
+
+void wgtDeviceNozzleRackPos::CreateGui()
+{
+    // RowA
+    m_rowup_panel = new StaticBox(this, wxID_ANY);
+    m_rowup_panel->SetCornerRadius(0);
+
+    wxBoxSizer* rowa_sizer = new wxBoxSizer(wxVERTICAL);
+    rowa_sizer->AddStretchSpacer();
+    m_btn_rowup = new ScalableButton(m_rowup_panel, wxID_ANY, "dev_rack_row_up", wxEmptyString, wxDefaultSize, wxDefaultPosition, wxBU_EXACTFIT | wxNO_BORDER, false, 25);
+    m_btn_rowup->Bind(wxEVT_ENTER_WINDOW, [this](auto&) { SetCursor(wxCURSOR_HAND); });
+    m_btn_rowup->Bind(wxEVT_LEAVE_WINDOW, [this](auto&) { SetCursor(wxCURSOR_ARROW); });
+    m_btn_rowup->Bind(wxEVT_BUTTON, &wgtDeviceNozzleRackPos::OnMoveRackUp, this);
+    rowa_sizer->Add(m_btn_rowup, 0, wxALIGN_CENTER | wxEXPAND | wxLEFT | wxRIGHT, FromDIP(10));
+
+    m_label_rowup_status = new Label(m_rowup_panel);
+    m_label_rowup_status->SetFont(Label::Body_12);
+    m_label_rowup_status->Show(false);
+    rowa_sizer->Add(m_label_rowup_status, 0, wxALIGN_CENTER | wxLEFT | wxRIGHT, FromDIP(10));
+
+    m_label_rowup = new Label(m_rowup_panel);
+    m_label_rowup->SetFont(Label::Body_14);
+    rowa_sizer->Add(m_label_rowup, 0, wxALIGN_CENTER | wxLEFT | wxRIGHT, FromDIP(10));
+    rowa_sizer->AddStretchSpacer();
+
+    m_rowup_panel->SetSizer(rowa_sizer);
+
+    // homing
+    m_btn_homing = new ScalableButton(this, wxID_ANY, "dev_rack_home", wxEmptyString, wxDefaultSize, wxDefaultPosition, wxBU_EXACTFIT | wxNO_BORDER, false, 25);
+    m_btn_homing->SetBackgroundColour(WGT_GREY200);
+    m_btn_homing->Bind(wxEVT_ENTER_WINDOW, [this](auto&) { SetCursor(wxCURSOR_HAND); });
+    m_btn_homing->Bind(wxEVT_LEAVE_WINDOW, [this](auto&) { SetCursor(wxCURSOR_ARROW); });
+    m_btn_homing->Bind(wxEVT_BUTTON, &wgtDeviceNozzleRackPos::OnBtnHomingRack, this);
+
+    // Row B
+    m_rowbottom_panel = new StaticBox(this, wxID_ANY);
+    m_rowbottom_panel->SetCornerRadius(0);
+
+    wxBoxSizer* rowb_sizer = new wxBoxSizer(wxVERTICAL);
+    rowb_sizer->AddStretchSpacer();
+
+    m_btn_rowbottom_up = new ScalableButton(m_rowbottom_panel, wxID_ANY, "dev_rack_row_up", wxEmptyString, wxDefaultSize, wxDefaultPosition, wxBU_EXACTFIT | wxNO_BORDER, false, 25);
+    m_btn_rowbottom_up->Bind(wxEVT_BUTTON, &wgtDeviceNozzleRackPos::OnMoveRackDown, this);
+    m_btn_rowbottom_up->Bind(wxEVT_ENTER_WINDOW, [this](auto&) { SetCursor(wxCURSOR_HAND); });
+    m_btn_rowbottom_up->Bind(wxEVT_LEAVE_WINDOW, [this](auto&) { SetCursor(wxCURSOR_ARROW); });
+    rowb_sizer->Add(m_btn_rowbottom_up, 0, wxALIGN_CENTER | wxLEFT | wxRIGHT, FromDIP(10));
+
+    m_label_rowbottom_status = new Label(m_rowbottom_panel);
+    m_label_rowbottom_status->SetFont(Label::Body_12);
+    m_label_rowbottom_status->Show(false);
+    rowb_sizer->Add(m_label_rowbottom_status, 0, wxALIGN_CENTER | wxLEFT | wxRIGHT, FromDIP(10));
+
+    m_label_rowbottom = new Label(m_rowbottom_panel);
+    m_label_rowbottom->SetFont(Label::Body_14);
+    rowb_sizer->Add(m_label_rowbottom, 0, wxALIGN_CENTER | wxLEFT | wxRIGHT, FromDIP(10));
+    rowb_sizer->AddStretchSpacer();
+
+    m_rowbottom_panel->SetSizer(rowb_sizer);
+
+    // bg style
+    SetBackgroundColour(*wxWHITE);
+    s_set_bg_style(m_rowup_panel, m_btn_rowup, m_label_rowup, m_label_rowup_status, *wxWHITE);
+    s_set_bg_style(m_rowbottom_panel, m_btn_rowbottom_up, m_label_rowbottom, m_label_rowbottom_status, *wxWHITE);
+
+    // main sizer
+    wxBoxSizer* main_sizer = new wxBoxSizer(wxVERTICAL);
+    main_sizer->Add(m_rowup_panel, 1, wxALIGN_TOP | wxEXPAND | wxALIGN_CENTER);
+    main_sizer->Add(m_btn_homing, 0, wxALIGN_CENTER | wxTOP | wxBOTTOM, FromDIP(10));
+    main_sizer->Add(m_rowbottom_panel, 1, wxALIGN_BOTTOM | wxEXPAND | wxALIGN_CENTER);
+    SetSizer(main_sizer);
+
+    SetMinSize(WX_DIP_SIZE(85, -1));
+
+    Layout();
+    Fit();
+}
+
+void wgtDeviceNozzleRackPos::UpdateRackPos(const std::shared_ptr<DevNozzleRack>& rack)
+{
+    m_rack = rack;
+    if (rack)
+    {
+        UpdateRackPos(rack->GetPosition(), rack->GetStatus(), rack->GetReadingCount() > 0);
+    }
+}
+
+static void s_show_label(Label* label, const wxString& text)
+{
+    label->SetLabel(text);
+    label->Show();
+}
+
+static void s_show_label(Label* label, const wxString& text, const wxColour& text_color)
+{
+    label->SetLabel(text);
+    label->SetForegroundColour(StateColor::darkModeColorFor(text_color));
+    label->Show();
+}
+
+void wgtDeviceNozzleRackPos::UpdateRackPos(DevNozzleRack::RackPos new_pos,
+    DevNozzleRack::RackStatus new_status, bool is_reading)
+{
+    // While reading, both rows show a "Running..." status and the move buttons are hidden.
+    if (is_reading)
+    {
+        s_show_label(m_label_rowup, L_RAW_A_STR, *wxBLACK);
+        s_show_label(m_label_rowup_status, _L("Running..."));
+
+        s_show_label(m_label_rowbottom, L_RAW_B_STR, *wxBLACK);
+        s_show_label(m_label_rowbottom_status, _L("Running..."));
+
+        m_btn_rowup->Show(false);
+        m_btn_rowbottom_up->Show(false);
+
+        m_rack_pos = DevNozzleRack::RACK_POS_UNKNOWN;
+        m_rack_status = DevNozzleRack::RACK_STATUS_UNKNOWN;
+        return;
+    }
+
+    if (new_pos != m_rack_pos || m_rack_status != new_status)
+    {
+        m_rack_pos = new_pos;
+        m_rack_status = new_status;
+
+        if (m_rack_status != DevNozzleRack::RACK_STATUS_IDLE)
+        {
+            s_show_label(m_label_rowup, L_RAW_A_STR, *wxBLACK);
+            s_show_label(m_label_rowup_status, _L("Running..."));
+
+            s_show_label(m_label_rowbottom, L_RAW_B_STR, *wxBLACK);
+            s_show_label(m_label_rowbottom_status, _L("Running..."));
+
+            m_btn_rowup->Show(false);
+            m_btn_rowbottom_up->Show(false);
+        }
+        else
+        {
+            if (new_pos == DevNozzleRack::RACK_POS_A_TOP)
+            {
+                s_show_label(m_label_rowup, L_RAW_A_STR, s_hgreen_clr);
+                s_show_label(m_label_rowup_status, _L("Raised"));
+
+                m_rowbottom_panel->SetBorderColor(*wxWHITE);
+                m_rowbottom_panel->SetBackgroundColor(*wxWHITE);
+                s_show_label(m_label_rowbottom, L_RAW_B_STR, *wxBLACK);
+                m_label_rowbottom_status->Show(false);
+
+                m_btn_rowup->Show(false);
+                m_btn_rowbottom_up->Show(true);
+            }
+            else if (new_pos == DevNozzleRack::RACK_POS_B_TOP)
+            {
+                s_show_label(m_label_rowup, L_RAW_B_STR, s_hgreen_clr);
+                s_show_label(m_label_rowup_status, _L("Raised"));
+                s_show_label(m_label_rowbottom, L_RAW_A_STR, *wxBLACK);
+                m_label_rowbottom_status->Show(false);
+
+                m_btn_rowup->Show(false);
+                m_btn_rowbottom_up->Show(true);
+            }
+            else
+            {
+                s_show_label(m_label_rowup, L_RAW_A_STR, *wxBLACK);
+                m_label_rowup_status->Show(false);
+
+                s_show_label(m_label_rowbottom, L_RAW_B_STR, *wxBLACK);
+                m_label_rowbottom_status->Show(false);
+
+                m_btn_rowup->Show(true);
+                m_btn_rowbottom_up->Show(true);
+            }
+        }
+
+        Layout();
+        Refresh();
+    }
+};
+
+void wgtDeviceNozzleRackPos::OnMoveRackUp(wxCommandEvent& evt)
+{
+    auto rack = m_rack.lock();
+    if (rack)
+    {
+        if (m_label_rowup->GetLabel() == L_RAW_A_STR)
+        {
+            rack->CtrlRackPosMove(DevNozzleRack::RACK_POS_A_TOP);
+        }
+        else if (m_label_rowup->GetLabel() == L_RAW_B_STR)
+        {
+            rack->CtrlRackPosMove(DevNozzleRack::RACK_POS_B_TOP);
+        }
+    }
+    evt.Skip();
+}
+
+void wgtDeviceNozzleRackPos::OnMoveRackDown(wxCommandEvent& evt)
+{
+    auto rack = m_rack.lock();
+    if (rack)
+    {
+        if (m_label_rowbottom->GetLabel() == L_RAW_A_STR)
+        {
+            rack->CtrlRackPosMove(DevNozzleRack::RACK_POS_A_TOP);
+        }
+        else if (m_label_rowbottom->GetLabel() == L_RAW_B_STR)
+        {
+            rack->CtrlRackPosMove(DevNozzleRack::RACK_POS_B_TOP);
+        }
+    }
+    evt.Skip();
+}
+
+void wgtDeviceNozzleRackPos::OnBtnHomingRack(wxCommandEvent& evt)
+{
+    if (auto rack = m_rack.lock())
+    {
+        rack->CtrlRackPosGoHome();
+    }
+    evt.Skip();
+}
+
+void wgtDeviceNozzleRackPos::Rescale()
+{
+    m_btn_rowup->msw_rescale();
+    m_btn_rowbottom_up->msw_rescale();
+    m_btn_homing->msw_rescale();
+}
+
+};// end of namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.h b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.h
new file mode 100644
index 0000000000..c4fa464e05
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.h
@@ -0,0 +1,196 @@
+//**********************************************************/
+/* File: wgtDeviceNozzleRack.h
+*  Description: The Device-tab panel with the toolhead nozzle and the H2C induction hotend rack.
+*
+*  \n class wgtDeviceNozzleRack;      // toolhead panel + rack area, side by side
+*  \n class wgtDeviceNozzleRackToolHead;
+*  \n class wgtDeviceNozzleRackArea;
+*  \n class wgtDeviceNozzleRackPos;
+*
+*  The single-nozzle tile class wgtDeviceNozzleRackNozzleItem lives in its own translation unit
+*  (wgtDeviceNozzleRackNozzleItem.{h,cpp}), so it is included here rather than redeclared.
+*  The Hotends-Info upgrade dialog (wgtDeviceNozzleRackUpgradeDlg) is intentionally not wired yet
+*  (see the TODO markers in the .cpp).
+//**********************************************************/
+
+#pragma once
+#include "slic3r/GUI/DeviceCore/DevNozzleRack.h"
+
+#include "wgtDeviceNozzleRackNozzleItem.h"
+
+#include "slic3r/GUI/Widgets/StaticBox.hpp"
+#include "slic3r/GUI/Widgets/AnimaController.hpp"
+
+#include <wx/panel.h>
+#include <wx/simplebook.h>
+#include <memory>
+#include <unordered_map>
+#include <vector>
+
+// Previous definitions
+class Button;
+class Label;
+class ScalableBitmap;
+class ScalableButton;
+namespace Slic3r
+{
+    struct DevNozzle;
+    class DevNozzleRack;
+namespace GUI
+{
+    class wgtDeviceNozzleRackArea;
+    class wgtDeviceNozzleRackNozzleItem;
+    class wgtDeviceNozzleRackToolHead;
+    class wgtDeviceNozzleRackPos;
+    class wgtDeviceNozzleRackTitle;
+    class wgtDeviceNozzleRackUpgradeDlg;
+}
+};
+
+namespace Slic3r::GUI
+{
+class wgtDeviceNozzleRack : public wxPanel
+{
+public:
+    wgtDeviceNozzleRack(wxWindow* parent,
+                        wxWindowID id = wxID_ANY,
+                        const wxPoint& pos = wxDefaultPosition,
+                        const wxSize& size = wxDefaultSize,
+                        long style = wxTAB_TRAVERSAL);
+    ~wgtDeviceNozzleRack() = default;
+
+public:
+    void UpdateRackInfo(std::shared_ptr<DevNozzleRack> rack);
+    void Rescale();
+
+private:
+    void CreateGui();
+
+private:
+    std::weak_ptr<DevNozzleRack> m_nozzle_rack;
+
+    // GUI
+    wgtDeviceNozzleRackToolHead* m_toolhead_panel{ nullptr };
+    wgtDeviceNozzleRackArea* m_rack_area{ nullptr };
+};
+
+
+class wgtDeviceNozzleRackToolHead : public wxPanel
+{
+public:
+    wgtDeviceNozzleRackToolHead(wxWindow* parent) : wxPanel(parent) { CreateGui();}
+
+public:
+    void UpdateToolHeadInfo(const DevNozzle& extruder_nozzle);
+    void Rescale();
+
+private:
+    void CreateGui();
+
+private:
+    bool m_extruder_nozzle_exist = false;
+    std::string m_filament_color;
+
+    // GUI
+    ScalableBitmap* m_extruder_nozzle_normal = nullptr;
+    ScalableBitmap* m_extruder_nozzle_empty = nullptr;
+    wxStaticBitmap* m_toolhead_icon;
+
+    Label*  m_nozzle_diamenter_label;
+    Label*  m_nozzle_flowtype_label;
+};
+
+
+class wgtDeviceNozzleRackArea : public wxPanel
+{
+public:
+    wgtDeviceNozzleRackArea(wxWindow* parent) : wxPanel(parent) { CreateGui();}
+
+public:
+    void UpdateRackInfo(std::weak_ptr<DevNozzleRack> rack);
+    void Rescale();
+
+private:
+    void CreateGui();
+    StaticBox* CreateNozzleBox(const std::vector<int> nozzle_idxes);
+    wxSizer* CreateRefreshBook(wxPanel* parent);
+
+    // updates
+    void UpdateNozzleItems(const std::unordered_map<int, wgtDeviceNozzleRackNozzleItem*>& nozzle_items,
+        std::shared_ptr<DevNozzleRack> nozzle_rack);
+
+    // events
+    void OnBtnHotendsInfos(wxCommandEvent& evt);
+    void OnBtnReadAll(wxCommandEvent& evt);
+
+private:
+    std::weak_ptr<DevNozzleRack> m_nozzle_rack;
+    DevNozzleRack::RackPos m_rack_pos = DevNozzleRack::RACK_POS_UNKNOWN;
+    DevNozzleRack::RackStatus m_rack_status = DevNozzleRack::RACK_STATUS_UNKNOWN;
+
+    // GUI
+    wxSimplebook* m_simple_book{ nullptr };
+    wxPanel* m_panel_content{ nullptr };
+    wxPanel* m_panel_refresh{ nullptr };
+
+    wgtDeviceNozzleRackTitle* m_title_nozzle_rack;
+    wxBoxSizer* m_hotends_sizer;
+    StaticBox* m_arow_nozzles_box;
+    StaticBox* m_brow_nozzles_box;
+    std::unordered_map<int, wgtDeviceNozzleRackNozzleItem*> m_nozzle_items;
+
+    wgtDeviceNozzleRackPos* m_rack_pos_panel;
+
+    Button* m_btn_hotends_infos;
+    Button* m_btn_read_all;
+
+    /* refresh book */
+    Label* m_progress_refresh{ nullptr };
+    AnimaIcon* m_refresh_icon{ nullptr };
+
+    // "Hotends Info" upgrade dialog. Owned for its ShowModal lifetime by
+    // OnBtnHotendsInfos; UpdateRackInfo forwards live device pushes to it while it is shown.
+    wgtDeviceNozzleRackUpgradeDlg* m_rack_upgrade_dlg = nullptr;
+};
+
+class wgtDeviceNozzleRackPos : public wxPanel
+{
+public:
+    explicit wgtDeviceNozzleRackPos(wxWindow* parent) : wxPanel(parent) { CreateGui();}
+
+public:
+    void UpdateRackPos(const std::shared_ptr<DevNozzleRack>& rack);
+    void Rescale();
+
+private:
+    void CreateGui();
+
+    void UpdateRackPos(DevNozzleRack::RackPos new_pos,
+                       DevNozzleRack::RackStatus new_status,
+                       bool is_reading);
+
+    // events
+    void OnMoveRackUp(wxCommandEvent& evt);
+    void OnMoveRackDown(wxCommandEvent& evt);
+    void OnBtnHomingRack(wxCommandEvent& evt);
+
+private:
+    std::weak_ptr<DevNozzleRack> m_rack;
+    DevNozzleRack::RackPos m_rack_pos = DevNozzleRack::RACK_POS_UNKNOWN;
+    DevNozzleRack::RackStatus m_rack_status = DevNozzleRack::RACK_STATUS_UNKNOWN;
+
+    // GUI
+    StaticBox* m_rowup_panel;
+    ScalableButton* m_btn_rowup;
+    Label* m_label_rowup_status{ nullptr };
+    Label* m_label_rowup{ nullptr };
+
+    StaticBox* m_rowbottom_panel;
+    ScalableButton* m_btn_rowbottom_up;
+    Label* m_label_rowbottom_status{ nullptr };
+    Label* m_label_rowbottom{ nullptr };
+
+    ScalableButton* m_btn_homing{ nullptr };
+};
+
+};// end of namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.cpp b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.cpp
new file mode 100644
index 0000000000..23c69bf6e2
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.cpp
@@ -0,0 +1,347 @@
+//**********************************************************/
+/* File: wgtDeviceNozzleRackNozzleItem.cpp
+*  Description: One nozzle cell of the H2C hotend rack view. Holds the
+*  wgtDeviceNozzleRackNozzleItem widget, the SetNozzleBmpColor helper and the layout
+*  constants it needs.
+//**********************************************************/
+
+#include "wgtDeviceNozzleRackNozzleItem.h"
+
+#include "slic3r/GUI/DeviceCore/DevNozzleSystem.h"
+
+#include "slic3r/GUI/I18N.hpp"
+#include "slic3r/GUI/MsgDialog.hpp"
+#include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/wxExtensions.hpp"
+
+#include "slic3r/GUI/Widgets/Label.hpp"
+
+#define WX_DIP_SIZE_46 wxSize(FromDIP(46), FromDIP(46))
+#define WX_DIP_SIZE(x, y) wxSize(FromDIP(x), FromDIP(y))
+
+#define WGT_RACK_NOZZLE_SIZE WX_DIP_SIZE(88, 100)
+
+static wxColour s_gray_clr("#B0B0B0");
+static wxColour s_hgreen_clr("#00AE42");
+static wxColour s_red_clr("#D01B1B");
+
+wxDEFINE_EVENT(EVT_NOZZLE_RACK_NOZZLE_ITEM_SELECTED, wxCommandEvent);
+
+namespace Slic3r::GUI
+{
+
+static wxBitmap SetNozzleBmpColor(const wxBitmap& bmp, const std::string& color_str) {
+    if(color_str.empty()) return bmp;
+
+    wxImage img = bmp.ConvertToImage();
+    wxColour color("#" + color_str);
+
+    for (int y = 0; y < img.GetHeight(); ++y) {
+        for (int x = 0; x < img.GetWidth(); ++x) {
+            unsigned char r = img.GetRed(x, y);
+            unsigned char g = img.GetGreen(x, y);
+            unsigned char b = img.GetBlue(x, y);
+
+            /*replace yellow with color*/
+            if ( r >= 180 && g >= 180 && b <= 150) {
+                img.SetRGB(x, y, color.Red(), color.Green(), color.Blue());
+            }
+        }
+    }
+
+    return wxBitmap(img, -1, bmp.GetScaleFactor());
+}
+
+wgtDeviceNozzleRackNozzleItem::wgtDeviceNozzleRackNozzleItem(wxWindow* parent, int nozzle_id)
+    : StaticBox(parent, wxID_ANY), m_nozzle_id(nozzle_id)
+{
+    CreateGui();
+}
+
+void wgtDeviceNozzleRackNozzleItem::CreateGui()
+{
+    // Background
+    SetCornerRadius(FromDIP(5));
+    SetBackgroundColor(*wxWHITE);
+
+    // Top H
+    wxSizer *top_h_sizer = new wxBoxSizer(wxHORIZONTAL);
+
+    m_nozzle_label_id = new Label(this);
+    m_nozzle_label_id->SetFont(Label::Body_12);
+    m_nozzle_label_id->SetBackgroundColour(*wxWHITE);
+    m_nozzle_label_id->SetLabel(wxString::Format("%d", m_nozzle_id + 1));
+
+    m_status             = NOZZLE_STATUS::NOZZLE_EMPTY;
+    m_nozzle_empty_image = new ScalableBitmap(this, "dev_rack_nozzle_empty", 46);
+    m_nozzle_icon = new wxStaticBitmap(this, wxID_ANY, m_nozzle_empty_image->bmp(), wxDefaultPosition, WX_DIP_SIZE_46);
+    m_nozzle_icon->SetBackgroundColour(*wxWHITE);
+
+    m_nozzle_selected_bitmap = new wxStaticBitmap(this, wxID_ANY, wxNullBitmap, wxDefaultPosition, WX_DIP_SIZE(20, 20));
+    m_nozzle_selected_bitmap->SetBackgroundColour(*wxWHITE);
+
+    top_h_sizer->Add(m_nozzle_label_id, 0, wxTOP | wxLEFT, FromDIP(6));
+    top_h_sizer->AddStretchSpacer(1);
+    top_h_sizer->Add(m_nozzle_icon, 0, wxTOP, FromDIP(10));
+    top_h_sizer->AddStretchSpacer(1);
+    top_h_sizer->Add(m_nozzle_selected_bitmap, 0, wxTOP | wxRIGHT, FromDIP(2));
+
+    // Bottom V
+    wxBoxSizer* bottom_v = new wxBoxSizer(wxVERTICAL);
+
+    wxSizer* label_h_sizer = new wxBoxSizer(wxHORIZONTAL);
+    m_nozzle_label_1 = new Label(this);
+    m_nozzle_label_1->SetFont(Label::Body_12);
+    m_nozzle_label_1->SetBackgroundColour(*wxWHITE);
+    m_nozzle_label_1->SetLabel(_L("Empty"));
+
+    label_h_sizer->Add(m_nozzle_label_1, 0, wxALIGN_LEFT);
+
+    auto status_icon = create_scaled_bitmap("dev_rack_nozzle_error_icon", this, 14);
+    m_nozzle_status_icon = new wxStaticBitmap(this, wxID_ANY, status_icon, wxDefaultPosition, WX_DIP_SIZE(14, 14));
+    m_nozzle_status_icon->Bind(wxEVT_LEFT_DOWN, &wgtDeviceNozzleRackNozzleItem::OnBtnNozzleStatus, this);
+    m_nozzle_status_icon->Bind(wxEVT_ENTER_WINDOW, [this](auto&) { SetCursor(wxCURSOR_HAND); });
+    m_nozzle_status_icon->Bind(wxEVT_LEAVE_WINDOW, [this](auto&) { SetCursor(wxCURSOR_ARROW); });
+    m_nozzle_status_icon->SetBackgroundColour(*wxWHITE);
+    m_nozzle_status_icon->Show(false);
+
+    label_h_sizer->Add(m_nozzle_status_icon, 0, wxALIGN_CENTER | wxLEFT, FromDIP(2));
+    bottom_v->Add(label_h_sizer, 0, wxALIGN_CENTER_HORIZONTAL | wxTOP, FromDIP(2));
+
+    m_nozzle_label_2 = new Label(this);
+    m_nozzle_label_2->SetFont(Label::Body_12);
+    m_nozzle_label_2->SetBackgroundColour(*wxWHITE);
+    bottom_v->Add(m_nozzle_label_2, 0, wxALIGN_CENTER_HORIZONTAL);
+
+    // Main sizer
+    wxSizer* main_sizer = new wxBoxSizer(wxVERTICAL);
+    main_sizer->Add(top_h_sizer, 0, wxEXPAND);
+    main_sizer->Add(bottom_v, 0, wxALIGN_CENTER_HORIZONTAL);
+    SetSizer(main_sizer);
+
+    SetMinSize(WGT_RACK_NOZZLE_SIZE);
+    SetMaxSize(WGT_RACK_NOZZLE_SIZE);
+    SetSize(WGT_RACK_NOZZLE_SIZE);
+    Layout();
+};
+
+void wgtDeviceNozzleRackNozzleItem::SetSelected(bool selected)
+{
+    if (!m_enable_select){
+        assert(false && "not support select");
+        return;
+    }
+
+    if (m_is_selected != selected) {
+        m_is_selected = selected;
+        if (selected) {
+            if (!m_nozzle_selected_image) {
+                m_nozzle_selected_image = new ScalableBitmap(this, "dev_rack_nozzle_selected", 20);
+            }
+
+            m_nozzle_selected_bitmap->SetBitmap(m_nozzle_selected_image->bmp());
+            SetBorderColor(StateColor::darkModeColorFor(s_hgreen_clr));
+        } else {
+            m_nozzle_selected_bitmap->SetBitmap(wxNullBitmap);
+            SetBorderColor(StateColor::darkModeColorFor(s_gray_clr));
+        }
+
+        Refresh();
+    }
+}
+
+void wgtDeviceNozzleRackNozzleItem::Update(const std::shared_ptr<DevNozzleRack> rack, bool on_rack /*= true*/)
+{
+    m_rack = rack;
+
+    if (rack) {
+        const auto        &nozzle_info  = on_rack ? rack->GetNozzle(m_nozzle_id) : rack->GetNozzleSystem()->GetExtNozzle(m_nozzle_id);
+        const wxString    &diameter_str = nozzle_info.GetNozzleDiameterStr();
+        const wxString    &flowtype_str = nozzle_info.GetNozzleFlowTypeStr();
+        const std::string &color        = nozzle_info.GetFilamentColor();
+
+        /*check empty first*/
+        if (nozzle_info.IsEmpty()) {
+            SetNozzleStatus(NOZZLE_STATUS::NOZZLE_EMPTY, _L("Empty"), wxEmptyString, color);
+        } else if (nozzle_info.IsNormal()) {
+            SetNozzleStatus(NOZZLE_STATUS::NOZZLE_NORMAL, diameter_str, flowtype_str, color);
+        } else if (nozzle_info.IsAbnormal()) {
+            SetNozzleStatus(NOZZLE_STATUS::NOZZLE_ERROR, _L("Error"), wxEmptyString, color);
+        } else if (nozzle_info.IsUnknown()) {
+            SetNozzleStatus(NOZZLE_STATUS::NOZZLE_UNKNOWN, _L("Unknown"), wxEmptyString, color);
+        }
+    }
+}
+
+void wgtDeviceNozzleRackNozzleItem::SetNozzleStatus(NOZZLE_STATUS status, const wxString& str1, const wxString& str2, const std::string& color)
+{
+    if (m_status != status || m_filament_color != color)
+    {
+        m_status = status;
+        m_filament_color = color;
+        switch (status)
+        {
+        case Slic3r::GUI::wgtDeviceNozzleRackNozzleItem::NOZZLE_EMPTY:
+        {
+            if (!m_nozzle_empty_image) { m_nozzle_empty_image = new ScalableBitmap(this, "dev_rack_nozzle_empty", 46);}
+            m_nozzle_icon->SetBitmap(m_nozzle_empty_image->bmp());
+            break;
+        }
+        case Slic3r::GUI::wgtDeviceNozzleRackNozzleItem::NOZZLE_NORMAL:
+        {
+            if (!m_nozzle_normal_image) { m_nozzle_normal_image = new ScalableBitmap(this, "dev_rack_nozzle_normal", 46);}
+            m_nozzle_icon->SetBitmap(SetNozzleBmpColor(m_nozzle_normal_image->bmp(), m_filament_color));
+            break;
+        }
+        case Slic3r::GUI::wgtDeviceNozzleRackNozzleItem::NOZZLE_UNKNOWN:
+        {
+            if (!m_nozzle_unknown_image) { m_nozzle_unknown_image = new ScalableBitmap(this, "dev_rack_nozzle_unknown", 46);}
+            m_nozzle_icon->SetBitmap(m_nozzle_unknown_image->bmp());
+            break;
+        }
+        case Slic3r::GUI::wgtDeviceNozzleRackNozzleItem::NOZZLE_ERROR:
+        {
+            if (!m_nozzle_error_image) { m_nozzle_error_image = new ScalableBitmap(this, "dev_rack_nozzle_error", 46);}
+            m_nozzle_icon->SetBitmap(m_nozzle_error_image->bmp());
+            break;
+        }
+        default:
+        {
+            break;
+        }
+        }
+
+        if (status == wgtDeviceNozzleRackNozzleItem::NOZZLE_ERROR)
+        {
+            m_nozzle_label_1->SetForegroundColour(StateColor::darkModeColorFor(s_red_clr));
+            m_nozzle_status_icon->Show(true);
+        }
+        else
+        {
+            m_nozzle_label_1->SetForegroundColour(StateColor::darkModeColorFor(*wxBLACK));
+            m_nozzle_status_icon->Show(false);
+        }
+    }
+
+    bool update_layout = (m_nozzle_label_1->GetLabel() != str1 || m_nozzle_label_2->GetLabel() != str2);
+    m_nozzle_label_1->SetLabel(str1);
+    m_nozzle_label_2->SetLabel(str2);
+
+    if (update_layout) {
+        Layout();
+    }
+}
+
+void wgtDeviceNozzleRackNozzleItem::OnBtnNozzleStatus(wxMouseEvent& evt)
+{
+    if (m_is_disabled) {
+        return;
+    }
+
+    auto rack = m_rack.lock();
+    if (rack && m_status == wgtDeviceNozzleRackNozzleItem::NOZZLE_ERROR)
+    {
+        // Orca: show the abnormal-hotend warning as an informational dialog only, with no
+        // "Jump to the upgrade page" button, since Orca's MessageDialog and device Upgrade UI
+        // have no such entry point. Fires when tapping an error-state rack nozzle's status icon.
+        MessageDialog dlg(nullptr, _L("The hotend is in an abnormal state and currently unavailable. "
+            "Please go to 'Device -> Upgrade' to upgrade firmware."), _L("Abnormal Hotend"), wxICON_WARNING | wxOK);
+        dlg.ShowModal();
+    }
+}
+
+void wgtDeviceNozzleRackNozzleItem::Rescale()
+{
+    if (m_nozzle_normal_image) { m_nozzle_normal_image->msw_rescale(); }
+    if (m_nozzle_empty_image) { m_nozzle_empty_image->msw_rescale(); }
+    if (m_nozzle_unknown_image) { m_nozzle_unknown_image->msw_rescale(); }
+    if (m_nozzle_error_image) { m_nozzle_error_image->msw_rescale(); }
+
+    auto status_icon = create_scaled_bitmap("dev_rack_nozzle_error_icon", this, 14);
+    m_nozzle_status_icon->SetBitmap(status_icon);
+    m_nozzle_status_icon->Refresh();
+
+    if (m_nozzle_selected_image) {
+        m_nozzle_selected_image->msw_rescale();
+        if (m_is_selected) {
+            m_nozzle_selected_bitmap->SetBitmap(m_nozzle_selected_image->bmp());
+        }
+    };
+
+    switch (m_status)
+    {
+    case Slic3r::GUI::wgtDeviceNozzleRackNozzleItem::NOZZLE_EMPTY:
+    {
+        m_nozzle_icon->SetBitmap(m_nozzle_empty_image->bmp());
+        break;
+    }
+    case Slic3r::GUI::wgtDeviceNozzleRackNozzleItem::NOZZLE_NORMAL:
+    {
+        m_nozzle_icon->SetBitmap(SetNozzleBmpColor(m_nozzle_normal_image->bmp(), m_filament_color));
+        break;
+    }
+    case Slic3r::GUI::wgtDeviceNozzleRackNozzleItem::NOZZLE_UNKNOWN:
+    {
+        m_nozzle_icon->SetBitmap(m_nozzle_unknown_image->bmp());
+        break;
+    }
+    case Slic3r::GUI::wgtDeviceNozzleRackNozzleItem::NOZZLE_ERROR:
+    {
+        m_nozzle_icon->SetBitmap(m_nozzle_error_image->bmp());
+        break;
+    }
+    default:
+    {
+        break;
+    }
+    };
+};
+
+void wgtDeviceNozzleRackNozzleItem::EnableSelect()
+{
+    if (m_enable_select == true) {
+        return;
+    };
+
+    m_enable_select = true;
+    m_nozzle_icon->Bind(wxEVT_LEFT_DOWN, [this](auto& evt) { OnItemSelected(evt); });
+    m_nozzle_label_id->Bind(wxEVT_LEFT_DOWN, [this](auto& evt) { OnItemSelected(evt); });
+    m_nozzle_label_1->Bind(wxEVT_LEFT_DOWN, [this](auto& evt) { OnItemSelected(evt); });
+    m_nozzle_label_2->Bind(wxEVT_LEFT_DOWN, [this](auto& evt) { OnItemSelected(evt); });
+    Bind(wxEVT_LEFT_DOWN, [this](auto& evt) { OnItemSelected(evt); });
+}
+
+void wgtDeviceNozzleRackNozzleItem::OnItemSelected(wxMouseEvent& evt)
+{
+    if (m_enable_select && !m_is_disabled){
+        SetSelected(true);
+        wxCommandEvent command_evt(EVT_NOZZLE_RACK_NOZZLE_ITEM_SELECTED, GetId());
+        command_evt.SetEventObject(this);
+        ProcessEvent(command_evt);
+    }
+
+    evt.Skip();
+}
+
+
+void wgtDeviceNozzleRackNozzleItem::SetDisable(bool disabled)
+{
+    if (m_is_disabled == disabled) {
+        return;
+    }
+
+    m_is_disabled = disabled;
+
+    auto bg_clr = disabled ? StateColor::darkModeColorFor("#E5E7EB") : StateColor::darkModeColorFor(*wxWHITE);
+    m_nozzle_icon->SetBackgroundColour(bg_clr);
+    m_nozzle_label_id->SetBackgroundColour(bg_clr);
+    m_nozzle_label_1->SetBackgroundColour(bg_clr);
+    m_nozzle_status_icon->SetBackgroundColour(bg_clr);
+    m_nozzle_label_2->SetBackgroundColour(bg_clr);
+    m_nozzle_selected_bitmap->SetBackgroundColour(bg_clr);
+
+    SetBackgroundColor(bg_clr);
+    Refresh();
+};
+
+};// end of namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.h b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.h
new file mode 100644
index 0000000000..2ed2b48d66
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.h
@@ -0,0 +1,99 @@
+//**********************************************************/
+/* File: wgtDeviceNozzleRackNozzleItem.h
+*  Description: One nozzle cell of the H2C hotend rack view.
+*
+*  This header defines only the single-nozzle-cell widget (and the selection event it emits), which
+*  is the one dependency MultiNozzleSync's HotEndTable needs. The rest of the Device-tab rack panel
+*  (wgtDeviceNozzleRack / ...Area / ...ToolHead / ...Pos) is not provided here.
+//**********************************************************/
+
+#pragma once
+#include "slic3r/GUI/DeviceCore/DevNozzleRack.h"
+
+#include "slic3r/GUI/Widgets/StaticBox.hpp"
+#include "slic3r/GUI/Widgets/Label.hpp" // complete type required by the inline SetDisplayIdText below
+
+#include <wx/panel.h>
+#include <memory>
+
+// Previous definitions
+class ScalableBitmap;
+namespace Slic3r
+{
+    struct DevNozzle;
+    class DevNozzleRack;
+};
+
+// Events
+wxDECLARE_EVENT(EVT_NOZZLE_RACK_NOZZLE_ITEM_SELECTED, wxCommandEvent);
+
+namespace Slic3r::GUI
+{
+class wgtDeviceNozzleRackNozzleItem : public StaticBox
+{
+public:
+    enum NOZZLE_STATUS
+    {
+        NOZZLE_EMPTY,
+        NOZZLE_NORMAL,
+        NOZZLE_UNKNOWN,
+        NOZZLE_ERROR
+    };
+
+public:
+    wgtDeviceNozzleRackNozzleItem(wxWindow* parent, int nozzle_id);
+
+public:
+    void Update(const std::shared_ptr<DevNozzleRack> rack, bool on_rack = true); // on_rack is false means extruder nozzle
+
+    int  GetNozzleId() const { return m_nozzle_id; }
+    void SetDisplayIdText(const wxString& text) { m_nozzle_label_id->SetLabel(text);};
+
+    void EnableSelect();;
+    void SetSelected(bool selected);
+    bool IsSelected() const { return m_is_selected; }
+
+    bool IsDisabled() const { return m_is_disabled; }
+    void SetDisable(bool disabled);
+
+    void Rescale();
+
+private:
+    void CreateGui();
+
+    void SetNozzleStatus(NOZZLE_STATUS status, const wxString& str1, const wxString& str2, const std::string& color);
+
+    void OnBtnNozzleStatus(wxMouseEvent& evt);
+    void OnItemSelected(wxMouseEvent& evt);
+
+private:
+    std::weak_ptr<DevNozzleRack> m_rack;
+
+    int           m_nozzle_id; // internal id, from 0 to 5
+    std::string   m_filament_color;
+    NOZZLE_STATUS m_status      = NOZZLE_STATUS::NOZZLE_EMPTY;
+
+    // select
+    bool  m_is_selected = false;
+    bool  m_enable_select = false;
+    ScalableBitmap* m_nozzle_selected_image{ nullptr };
+    wxStaticBitmap* m_nozzle_selected_bitmap{ nullptr };
+
+    // enable or disable
+    bool m_is_disabled = false;
+
+    // Images
+    ScalableBitmap* m_nozzle_normal_image{ nullptr };
+    ScalableBitmap* m_nozzle_empty_image{ nullptr };
+    ScalableBitmap* m_nozzle_unknown_image{ nullptr };
+    ScalableBitmap* m_nozzle_error_image{ nullptr };
+
+    // GUI
+    wxStaticBitmap* m_nozzle_icon{ nullptr };
+    Label* m_nozzle_label_id { nullptr };
+    Label* m_nozzle_label_1{ nullptr };
+    wxStaticBitmap* m_nozzle_status_icon = nullptr;
+    Label* m_nozzle_label_2{ nullptr };
+};
+
+};// end of namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.cpp b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.cpp
new file mode 100644
index 0000000000..e992d4b1ab
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.cpp
@@ -0,0 +1,696 @@
+//**********************************************************/
+/* File: wgtDeviceNozzleRackUpdate.cpp
+*  Description: The dialog for reading/upgrading the H2C induction-hotend-rack firmware.
+*
+* \n class wgtDeviceNozzleRackUpdate
+//**********************************************************/
+
+#include "wgtDeviceNozzleRackUpdate.h"
+
+#include "slic3r/GUI/DeviceCore/DevNozzleSystem.h"
+
+#include "slic3r/GUI/MainFrame.hpp"
+#include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/I18N.hpp"
+#include "slic3r/GUI/MsgDialog.hpp"
+#include "slic3r/GUI/wxExtensions.hpp"
+
+#include "slic3r/GUI/Widgets/Button.hpp"
+#include "slic3r/GUI/Widgets/Label.hpp"
+
+#define WX_DIP_SIZE(x, y) wxSize(FromDIP(x), FromDIP(y))
+
+static wxColour s_red_clr("#D01B1B");
+
+namespace Slic3r::GUI
+{
+
+wxDEFINE_EVENT(wxEVT_NOZZLE_JUMP_UPGRADE, wxCommandEvent);
+
+wgtDeviceNozzleRackUpgradeDlg::wgtDeviceNozzleRackUpgradeDlg(wxWindow* parent, const std::shared_ptr<DevNozzleRack> rack)
+    : DPIDialog(parent, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxCAPTION | wxCLOSE_BOX)
+{
+    m_rack_upgrade_panel = new wgtDeviceNozzleRackUprade(this);
+    m_rack_upgrade_panel->UpdateRackInfo(rack);
+
+    Bind(wxEVT_NOZZLE_JUMP_UPGRADE, [this](wxCommandEvent&) {
+        EndModal(wxID_OK);
+    });
+
+    auto main_sizer = new wxBoxSizer(wxVERTICAL);
+    main_sizer->Add(m_rack_upgrade_panel, 0, wxEXPAND);
+    SetSizer(main_sizer);
+    Layout();
+    Fit();
+
+    wxGetApp().UpdateDlgDarkUI(this);
+}
+
+void wgtDeviceNozzleRackUpgradeDlg::UpdateRackInfo(const std::shared_ptr<DevNozzleRack> rack)
+{
+    m_rack_upgrade_panel->UpdateRackInfo(rack);
+}
+
+void wgtDeviceNozzleRackUpgradeDlg::on_dpi_changed(const wxRect& suggested_rect)
+{
+    m_rack_upgrade_panel->Rescale();
+}
+
+wgtDeviceNozzleRackUprade::wgtDeviceNozzleRackUprade(wxWindow* parent,
+                                                     wxWindowID id,
+                                                     const wxPoint& pos,
+                                                     const wxSize& size,
+                                                     long style)
+    : wxPanel(parent, id, pos, size, style)
+{
+    CreateGui();
+}
+
+void wgtDeviceNozzleRackUprade::CreateGui()
+{
+    SetBackgroundColour(*wxWHITE);
+
+    // Main vertical sizer
+    auto* main_sizer = new wxBoxSizer(wxVERTICAL);
+
+    // Header: title + buttons
+    auto* header_sizer = new wxBoxSizer(wxHORIZONTAL);
+
+    // Title label
+    auto* title_label = new Label(this, _L("Hotends Info"));
+    title_label->SetFont(Label::Head_14);
+    header_sizer->Add(title_label, 1, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(20));
+
+    // Spacer
+    header_sizer->AddStretchSpacer();
+    main_sizer->Add(header_sizer, 0, wxEXPAND | wxTOP | wxRIGHT, FromDIP(10));
+
+    // "Nozzles"
+    m_extruder_nozzle_item = new wgtDeviceNozzleRackHotendUpdate(this, "R");
+    m_extruder_nozzle_item->UpdateColourStyle(wxColour("#F8F8F8"));
+    m_extruder_nozzle_item->SetExtruderNozzleId(MAIN_EXTRUDER_ID);
+
+    main_sizer->Add(m_extruder_nozzle_item, 0, wxEXPAND | wxALL, FromDIP(12));
+    for (int id = 0; id < 6; id ++)
+    {
+        auto item = new wgtDeviceNozzleRackHotendUpdate(this, wxString::Format("%d", id + 1));
+        item->SetRackNozzleId(id);
+        m_nozzle_items[id] = item;
+
+        main_sizer->Add(item, 0, wxEXPAND | wxALL, FromDIP(12));
+        if (id < 5)
+        {
+            wxPanel* separator = new wxPanel(this);
+            separator->SetMaxSize(wxSize(-1, FromDIP(1)));
+            separator->SetMinSize(wxSize(-1, FromDIP(1)));
+            separator->SetBackgroundColour(wxColour(238, 238, 238));// Orca: grey300 spelled out as a literal RGB, since Orca has no equivalent grey-300 colour macro
+            main_sizer->Add(separator, 0, wxEXPAND | wxLEFT | wxRIGHT, FromDIP(12));
+        }
+    }
+
+    main_sizer->AddSpacer(FromDIP(20));
+
+    // Set sizer
+    this->SetSizer(main_sizer);
+    this->Layout();
+}
+
+void wgtDeviceNozzleRackUprade::UpdateRackInfo(const std::shared_ptr<DevNozzleRack> rack)
+{
+    m_nozzle_rack = rack;
+    if (!rack) { return;}
+
+    // update the nozzles
+    m_extruder_nozzle_item->UpdateExtruderNozzleInfo(rack);
+    for (auto iter : m_nozzle_items)
+    {
+        iter.second->UpdateRackNozzleInfo(rack);
+    }
+
+    // update layout
+    Layout();
+}
+
+void wgtDeviceNozzleRackUprade::OnBtnReadAll(wxCommandEvent& e)
+{
+    if (auto rack = m_nozzle_rack.lock())
+    {
+        rack->CtrlRackReadAll(true);
+    }
+}
+
+void wgtDeviceNozzleRackUprade::Rescale()
+{
+    m_extruder_nozzle_item->Rescale();
+    for (auto& iter : m_nozzle_items)
+    {
+        iter.second->Rescale();
+    }
+}
+
+#define WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG *wxWHITE
+wgtDeviceNozzleRackHotendUpdate::wgtDeviceNozzleRackHotendUpdate(wxWindow* parent, const wxString& idx_text)
+    : StaticBox(parent, wxID_ANY)
+{
+    CreateGui();
+
+    m_idx_label->SetLabel(idx_text);
+}
+
+void wgtDeviceNozzleRackHotendUpdate::CreateGui()
+{
+    SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+    SetBorderColor(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+    SetCornerRadius(0);
+
+    //load nozzle hs image
+    for (int i = 1; i <= 4; i++)
+    {
+        auto normalImage = new ScalableBitmap(this, "Nozzle_HS_01_0" + std::to_string(i * 2), 46);
+        auto bigImage = new ScalableBitmap(this, "Big_Nozzle_HS_01_0" + std::to_string(i * 2), 216);
+        nozzle_hs.push_back({normalImage, bigImage});
+    }
+    for (int i = 2; i <= 4; i++)
+    {
+        auto normalImage = new ScalableBitmap(this, "Nozzle_HH_01_0" + std::to_string(i * 2), 46);
+        auto bigImage = new ScalableBitmap(this, "Big_Nozzle_HH_01_0" + std::to_string(i * 2), 216);
+        nozzle_hh.push_back({normalImage, bigImage});
+    }
+
+    auto* content_sizer = new wxBoxSizer(wxHORIZONTAL);
+
+    // Index
+    m_idx_label = new Label(this);
+    m_idx_label->SetFont(Label::Head_14);
+    m_idx_label->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+    content_sizer->Add(m_idx_label, 0, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(25));
+
+    // Icon
+    wxPanel* imagePanel = new wxPanel(this);
+    imagePanel->SetMaxSize(WX_DIP_SIZE(46, -1));
+    imagePanel->SetMinSize(WX_DIP_SIZE(46, -1));
+    imagePanel->SetSize(wxSize(FromDIP(46), FromDIP(-1)));
+    wxBoxSizer* panelSizer = new wxBoxSizer(wxVERTICAL);
+    imagePanel->SetSizer(panelSizer);
+
+    m_nozzle_empty_image = new ScalableBitmap(imagePanel, "dev_rack_nozzle_empty", 46);
+    m_icon_bitmap = new wxStaticBitmap(imagePanel, wxID_ANY, m_nozzle_empty_image->bmp());
+    panelSizer->Add(m_icon_bitmap, 0, wxALIGN_CENTER);
+    content_sizer->Add(imagePanel, 0, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(25));
+    m_icon_bitmap->Bind(wxEVT_ENTER_WINDOW, &wgtDeviceNozzleRackHotendUpdate::OnBitmapHoverEnter, this);
+    m_icon_bitmap->Bind(wxEVT_LEAVE_WINDOW, &wgtDeviceNozzleRackHotendUpdate::OnBitmapHoverLeave, this);
+
+    // Diameter/type (vertical)
+    wxPanel* type_panel = new wxPanel(this);
+    auto* main_type_sizer = new wxBoxSizer(wxVERTICAL);
+    auto* type_sizer_row_1 = new wxBoxSizer(wxHORIZONTAL);
+    auto* type_sizer_row_2 = new wxBoxSizer(wxHORIZONTAL);
+
+    m_material_label = new Label(type_panel);
+    m_material_label->SetFont(Label::Body_12);
+    m_material_label->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+
+    m_colour_box = new StaticBox(type_panel);
+    m_colour_box->SetMaxSize(WX_DIP_SIZE(16, 16));
+    m_colour_box->SetMinSize(WX_DIP_SIZE(16, 16));
+    m_colour_box->SetCornerRadius(FromDIP(2));
+    m_colour_box->SetSize(wxSize(FromDIP(16), FromDIP(16)));
+
+    type_sizer_row_1->Add(m_colour_box, 0, wxALIGN_CENTER_VERTICAL | wxALIGN_LEFT);
+    type_sizer_row_1->AddStretchSpacer(1);
+    type_sizer_row_1->Add(m_material_label, 0, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(2));
+
+    m_diameter_label = new Label(type_panel);
+    m_diameter_label->SetFont(Label::Body_12);
+    m_diameter_label->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+
+    m_flowtype_label = new Label(type_panel);
+    m_flowtype_label->SetFont(Label::Body_12);
+    m_flowtype_label->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+
+    m_type_label = new Label(type_panel);
+    m_type_label->SetFont(Label::Body_12);
+    m_type_label->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+
+    type_sizer_row_2->Add(m_diameter_label, 0, wxALIGN_CENTER_VERTICAL | wxALIGN_LEFT );
+    type_sizer_row_2->Add(m_flowtype_label, 0, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(2));
+    type_sizer_row_2->Add(m_type_label, 1, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(2));
+
+    main_type_sizer->Add(type_sizer_row_1, 0, wxALIGN_LEFT);
+    main_type_sizer->Add(type_sizer_row_2, 1, wxALIGN_LEFT | wxEXPAND | wxTOP, FromDIP(4));
+    type_panel->SetSizer(main_type_sizer);
+    type_panel->SetMaxSize(WX_DIP_SIZE(160, 40));
+    type_panel->SetMinSize(WX_DIP_SIZE(160, 40));
+    type_panel->SetSize(WX_DIP_SIZE(160, 40));
+
+    content_sizer->Add(type_panel, 1, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(12));
+
+    // SN and version (vertical)
+    wxPanel* info_panel = new wxPanel(this);
+    auto* info_sizer = new wxBoxSizer(wxVERTICAL);
+    m_sn_label = new Label(info_panel);
+    m_sn_label->SetFont(Label::Body_12);
+    m_sn_label->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+
+    auto* version_h_sizer = new wxBoxSizer(wxHORIZONTAL);
+    m_version_label = new Label(info_panel);
+    m_version_label->SetFont(Label::Body_12);
+    m_version_label->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+
+    m_version_new_label = new Label(info_panel);
+    m_version_new_label->SetFont(Label::Body_12);
+    m_version_new_label->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+    m_version_new_label->SetForegroundColour(wxColour(0, 168, 84)); // Green
+
+    version_h_sizer->Add(m_version_label, 0, wxALIGN_CENTER_VERTICAL);
+    version_h_sizer->Add(m_version_new_label, 0, wxALIGN_CENTER_VERTICAL);
+    info_sizer->Add(m_sn_label, 0, wxALIGN_LEFT);
+    info_sizer->Add(version_h_sizer, 0, wxALIGN_LEFT | wxTOP, FromDIP(4));
+    info_panel->SetSizer(info_sizer);
+    info_panel->SetMaxSize(WX_DIP_SIZE(183, 40));
+    info_panel->SetMinSize(WX_DIP_SIZE(183, 40));
+    info_panel->SetSize(WX_DIP_SIZE(183, 40));
+
+    //Used Time
+    m_used_time = new Label(this);
+    m_used_time->SetFont(Label::Body_12);
+    m_used_time->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+
+    m_refresh_icon = new ScalableBitmap(this, "refresh_printer", 12);
+    m_error_icon = new ScalableBitmap(this, "error", 14);
+    m_status_bitmap = new wxStaticBitmap(this, wxID_ANY, m_refresh_icon->bmp());
+    m_status_bitmap->Bind(wxEVT_LEFT_UP, &wgtDeviceNozzleRackHotendUpdate::OnStatusIconClick, this);
+
+    std::vector<std::string> list{"refresh_nozzle_1", "refresh_nozzle_2", "refresh_nozzle_3", "refresh_nozzle_4"};
+    // Orca: AnimaIcon has no per-instance size argument (it fixes 25px internally), so no size is
+    // passed here.
+    m_refreshing_icon = new AnimaIcon(this, wxID_ANY, list, "refresh_nozzle", 100);
+    m_refreshing_icon->Show(false);
+
+
+    m_status_label = new Label(this);
+    m_status_label->SetFont(Label::Body_12);
+
+    content_sizer->Add(info_panel, 1, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(20));
+    content_sizer->Add(m_used_time, 1, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(20));
+    content_sizer->Add(m_status_label, 0, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(20));
+    content_sizer->Add(m_status_bitmap, 0, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(2));
+    content_sizer->Add(m_refreshing_icon, 0, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(2));
+    content_sizer->AddSpacer(FromDIP(25));
+
+    auto* main_sizer = new wxBoxSizer(wxHORIZONTAL);
+    main_sizer->Add(content_sizer, 0, wxEXPAND | wxTOP | wxBOTTOM, FromDIP(10));
+
+    SetSizer(main_sizer);
+    Layout();
+}
+
+void wgtDeviceNozzleRackHotendUpdate::OnStatusIconClick(wxMouseEvent& event)
+{
+    if (m_status_label->GetLabel() == _L("Refresh"))
+    {
+        m_status_label->SetForegroundColour(wxColour("#A3A3A3"));
+        m_status_label->SetLabel(_L("Refreshing"));
+        m_status_bitmap->Show(false);
+        if(!m_refreshing_icon->IsPlaying())
+        {
+            m_refreshing_icon->Play();
+            m_refreshing_icon->Show();
+        }
+        if (auto shared = m_nozzle_rack.lock())
+        {
+            shared->CrtlRackReadNozzle(m_rack_nozzle_id);
+        }
+        Layout();
+    }
+
+    if (m_status_label->GetLabel() == _L("Error") /*&& m_nozzle_status == NOZZLE_STATUS_ABNORMAL*/)
+    {
+        if (auto shared = m_nozzle_rack.lock())
+        {
+            MessageDialog dlg(nullptr, _L("Hotend status abnormal, unavailable at present. Please upgrade the firmware"
+            " and try again."), _L("Update"), wxICON_WARNING);
+            dlg.AddButton(wxID_CANCEL, _L("Cancel"), false);
+            dlg.AddButton(wxID_OK,_L("Jump to the upgrade page"), true);
+
+            if (dlg.ShowModal() == wxID_OK)
+            {
+                wxGetApp().mainframe->m_monitor->jump_to_Upgrade();
+
+                wxCommandEvent evt(wxEVT_NOZZLE_JUMP_UPGRADE, GetId());
+                evt.SetEventObject(this);
+                wxWindow* target = GetParent();
+                if (target)
+                {
+                    target = target->GetParent();
+                    if (target)
+                    {
+                        wxPostEvent(target, evt);
+                    }
+                }
+            };
+        }
+    }
+}
+
+void wgtDeviceNozzleRackHotendUpdate::OnBitmapHoverEnter(wxMouseEvent& event)
+{
+    int scaledW = FromDIP(240);
+    int scaledH = FromDIP(240);
+
+    ScalableBitmap* scaledBmp{nullptr};
+    if (m_nozzle_status == NOZZLE_STATUS_EMPTY || m_nozzle_status == NOZZLE_STATUS_UNKNOWN || !findNozzleImage)
+    {
+        if (!m_scaled_nozzle_empty_image) {m_scaled_nozzle_empty_image = new ScalableBitmap(this, "dev_rack_nozzle_empty", 216);}
+
+        scaledBmp = m_scaled_nozzle_empty_image;
+    }
+    else
+    {
+        scaledBmp = m_scaled_nozzle_image;
+    }
+
+    m_hoverFrame = new wxFrame(nullptr, wxID_ANY, "",
+                                wxDefaultPosition, wxDefaultSize,
+                                wxFRAME_NO_TASKBAR | wxBORDER_NONE | wxTRANSPARENT_WINDOW);
+    m_hoverFrame->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
+    m_hoverFrame->SetSize(scaledW, scaledH);
+    wxBoxSizer* frameSizer = new wxBoxSizer(wxVERTICAL);
+    m_hoverFrame->SetSizer(frameSizer);
+
+    wxStaticBitmap* hoverBmp = new wxStaticBitmap(m_hoverFrame, wxID_ANY, scaledBmp->bmp());
+    frameSizer->Add(hoverBmp, 0, wxALIGN_CENTER_HORIZONTAL | wxTOP | wxBOTTOM, FromDIP(12));
+
+    wxPoint mousePos = wxGetMousePosition();
+    m_hoverFrame->SetPosition(wxPoint(mousePos.x + 10, mousePos.y));
+    m_hoverFrame->Layout();
+    m_hoverFrame->Show(true);
+
+    event.Skip();
+}
+
+void wgtDeviceNozzleRackHotendUpdate::OnBitmapHoverLeave(wxMouseEvent& event)
+{
+    if (m_hoverFrame)
+    {
+        m_hoverFrame->Destroy();
+        m_hoverFrame = nullptr;
+    }
+    event.Skip();
+}
+
+void wgtDeviceNozzleRackHotendUpdate::updateNozzleImage(const DevNozzle& nozzle)
+{
+    if (m_nozzle_status == NOZZLE_STATUS_UNKNOWN || m_nozzle_status == NOZZLE_STATUS_EMPTY)
+    {
+        if (!m_nozzle_empty_image) {m_nozzle_empty_image = new ScalableBitmap(this, "dev_rack_nozzle_empty", 46);}
+        m_icon_bitmap->SetBitmap(m_nozzle_empty_image->bmp());
+        m_icon_bitmap->Refresh();
+        return;
+    }
+    findNozzleImage = false;
+    int index = -1;
+    switch (nozzle.GetNozzleDiameterType()) {
+        case NOZZLE_DIAMETER_0_2: index = 0; break;
+        case NOZZLE_DIAMETER_0_4: index = 1; break;
+        case NOZZLE_DIAMETER_0_6: index = 2; break;
+        case NOZZLE_DIAMETER_0_8: index = 3; break;
+        default:                  index = -1; break;
+    }
+    NozzleType nozzleType = nozzle.GetNozzleType();
+    if (nozzleType == ntHardenedSteel || nozzleType == ntStainlessSteel)
+    {
+        if (nozzle.GetNozzleFlowType() == H_FLOW && index >= 1)
+        {
+            m_nozzle_image = nozzle_hh[index - 1][0];
+            m_icon_bitmap->SetBitmap(m_nozzle_image->bmp());
+            m_scaled_nozzle_image = nozzle_hh[index - 1][1];
+            findNozzleImage = true;
+        }
+        else if (nozzle.GetNozzleFlowType() == S_FLOW && index >= 0)
+        {
+            m_nozzle_image = nozzle_hs[index][0];
+            m_icon_bitmap->SetBitmap(m_nozzle_image->bmp());
+            m_scaled_nozzle_image = nozzle_hs[index][1];
+            findNozzleImage = true;
+        }
+    }
+    if (!findNozzleImage)
+    {
+        if (!m_nozzle_empty_image) {m_nozzle_empty_image = new ScalableBitmap(this, "dev_rack_nozzle_empty", 46);}
+        m_icon_bitmap->SetBitmap(m_nozzle_empty_image->bmp());
+    }
+    m_icon_bitmap->Refresh();
+}
+
+void wgtDeviceNozzleRackHotendUpdate::UpdateColourStyle(const wxColour& clr)
+{
+    SetBackgroundColour(clr);
+    SetBorderColor(clr);
+
+    // BFS: Update all children background color
+    auto children = GetChildren();
+    while (!children.IsEmpty())
+    {
+        auto win = children.front();
+        children.pop_front();
+        win->SetBackgroundColour(clr);
+
+        for (auto child : win->GetChildren())
+        {
+            children.push_back(child);
+        }
+    }
+}
+
+void wgtDeviceNozzleRackHotendUpdate::UpdateExtruderNozzleInfo(const std::shared_ptr<DevNozzleRack> rack)
+{
+    m_nozzle_rack = rack;
+    if (rack)
+    {
+        DevNozzleSystem* nozzle_system = rack->GetNozzleSystem();
+        if (nozzle_system)
+        {
+            UpdateInfo(nozzle_system->GetExtNozzle(m_ext_nozzle_id));
+        }
+    }
+}
+
+void wgtDeviceNozzleRackHotendUpdate::UpdateRackNozzleInfo(const std::shared_ptr<DevNozzleRack> rack)
+{
+    m_nozzle_rack = rack;
+    if (rack)
+    {
+        UpdateInfo(rack->GetNozzle(m_rack_nozzle_id));
+    }
+}
+
+void wgtDeviceNozzleRackHotendUpdate::UpdateInfo(const DevNozzle& nozzle)
+{
+    /*update nozzle possition and background*/
+    if (auto share = m_nozzle_rack.lock())
+    {
+        // if (share->GetReadingCount() > 0 && m_status_label->IsShown())
+        if (share->GetReadingCount() > 0 && m_status_label->IsShown() && m_status_label->GetLabel() == _L("Refreshing"))
+        {
+            m_refreshing_icon->Play();
+            m_refreshing_icon->Show();
+            m_nozzle_status = NOZZLE_STATUS_DC;
+            return;
+        }
+        else
+        {
+            m_refreshing_icon->Stop();
+            m_refreshing_icon->Show(false);
+        }
+    }
+
+    wxString filamentDisplayName{};
+    for (auto iter = GUI::wxGetApp().preset_bundle->filaments.begin(); iter != GUI::wxGetApp().preset_bundle->filaments.end(); ++iter)
+    {
+        const Preset& filament_preset = *iter;
+        // const auto& config = filament_preset.config;
+        if (filament_preset.filament_id == nozzle.GetFilamentId())
+        {
+            filamentDisplayName = wxString(filament_preset.alias);
+        }
+    }
+
+    if (nozzle.IsEmpty() && m_nozzle_status != NOZZLE_STATUS_EMPTY)
+    {
+        m_nozzle_status = NOZZLE_STATUS_EMPTY;
+
+        m_material_label->Show(false);
+        m_colour_box->Show(false);
+
+        m_diameter_label->Show(false);
+        m_flowtype_label->Show(false);
+        m_type_label->SetLabel(_L("Empty"));
+        m_type_label->SetForegroundColour(StateColor::darkModeColorFor(*wxBLACK));
+
+        m_sn_label->Show(false);
+        m_version_label->Show(false);
+        m_version_new_label->Show(false);
+
+        updateNozzleImage(nozzle);
+
+        m_used_time->Show(false);
+        m_status_label->Show(false);
+        m_status_bitmap->Show(false);
+
+    }
+    else if (nozzle.IsNormal() && m_nozzle_status != NOZZLE_STATUS_NORMAL)
+    {
+        m_nozzle_status = NOZZLE_STATUS_NORMAL;
+
+        m_material_label->SetLabel(filamentDisplayName);
+        m_colour_box->SetBackgroundColour(wxColour("#" + nozzle.GetFilamentColor()));
+        m_colour_box->SetBorderColor(wxColour("#" + nozzle.GetFilamentColor()));
+        m_material_label->Show(true);
+        m_colour_box->Show(true);
+
+        m_diameter_label->Show(true);
+        m_flowtype_label->Show(true);
+        m_diameter_label->SetLabel(nozzle.GetNozzleDiameterStr());
+        m_flowtype_label->SetLabel(nozzle.GetNozzleFlowTypeStr());
+        m_type_label->SetLabel(nozzle.GetNozzleTypeStr());
+        m_type_label->SetForegroundColour(StateColor::darkModeColorFor(*wxBLACK));
+
+        m_sn_label->Show(true);
+        m_version_label->Show(true);
+
+        updateNozzleImage(nozzle);
+
+        m_used_time->Show(true);
+        m_status_label->Show(false);
+        m_status_bitmap->Show(false);
+    }
+    else if (nozzle.IsAbnormal() && m_nozzle_status != NOZZLE_STATUS_ABNORMAL)
+    {
+        m_nozzle_status = NOZZLE_STATUS_ABNORMAL;
+
+        m_material_label->SetLabel(filamentDisplayName);
+        m_colour_box->SetBackgroundColour(wxColour("#" + nozzle.GetFilamentColor()));
+        m_colour_box->SetBorderColor(wxColour("#" + nozzle.GetFilamentColor()));
+        m_material_label->Show(true);
+        m_colour_box->Show(true);
+
+        m_diameter_label->Show(true);
+        m_flowtype_label->Show(true);
+        m_diameter_label->SetLabel(nozzle.GetNozzleDiameterStr());
+        m_flowtype_label->SetLabel(nozzle.GetNozzleFlowTypeStr());
+        m_type_label->SetLabel(nozzle.GetNozzleTypeStr());
+        m_type_label->SetForegroundColour(StateColor::darkModeColorFor(*wxBLACK));
+
+        updateNozzleImage(nozzle);
+
+        m_status_label->Show(true);
+        m_status_bitmap->Show(true);
+        m_status_label->SetForegroundColour(StateColor::darkModeColorFor(wxColour("#E14747")));
+        m_status_label->SetLabel(_L("Error"));
+        m_status_bitmap->SetBitmap(m_error_icon->bmp());
+        m_status_bitmap->Refresh();
+    }
+    else if (nozzle.IsUnknown()  && m_nozzle_status != NOZZLE_STATUS_UNKNOWN)
+    {
+        m_nozzle_status = NOZZLE_STATUS_UNKNOWN;
+
+        m_colour_box->Show(false);
+        m_material_label->SetLabel(wxString("--"));
+        m_material_label->Show(true);
+
+        m_diameter_label->Show(false);
+        m_flowtype_label->Show(false);
+        m_type_label->SetLabel(_L("Unknown"));
+        m_type_label->SetForegroundColour(StateColor::darkModeColorFor(*wxBLACK));
+
+        m_sn_label->Show(true);
+        m_version_label->Show(true);
+
+        updateNozzleImage(nozzle);
+
+        m_used_time->Show(true);
+        m_status_label->Show(true);
+        m_status_bitmap->Show(true);
+        m_status_label->SetForegroundColour(wxColour("#00AE42"));
+        m_status_label->SetLabel(_L("Refresh"));
+        m_status_bitmap->SetBitmap(m_refresh_icon->bmp());
+        m_status_bitmap->Refresh();
+    }
+
+    // Update firmware info
+    const DevFirmwareVersionInfo& firmware = nozzle.GetFirmwareInfo();
+    if (nozzle.IsUnknown())
+    {
+        m_sn_label->SetLabel(wxString::Format("%s: --", _L("SN")));
+        m_version_label->SetLabel(wxString::Format("%s: --", _L("Version")));
+        m_version_new_label->Show(false);
+    }
+    if (nozzle.IsNormal() || nozzle.IsAbnormal())
+    {
+        if (firmware.isValid())
+        {
+            m_sn_label->SetLabel(wxString::Format("%s: %s", _L("SN"), firmware.sn));
+
+            if (!firmware.sw_new_ver.empty() && firmware.sw_new_ver != firmware.sw_ver)
+            {
+                m_version_label->SetLabel(wxString::Format("%s: %s > ", _L("Version"), firmware.sw_ver));
+                m_version_new_label->SetLabel(wxString::Format("%s", firmware.sw_new_ver));
+                m_version_new_label->Show(true);
+            }
+            else
+            {
+                m_version_label->SetLabel(wxString::Format("%s:%s", _L("Version"), firmware.sw_ver));
+                m_version_new_label->Show(false);
+            }
+        }
+        else
+        {
+            m_sn_label->SetLabel(wxString::Format("%s: --", _L("SN")));
+            m_version_label->SetLabel(wxString::Format("%s: --", _L("Version")));
+            m_version_new_label->Show(false);
+        }
+    }
+
+    if (!nozzle.IsEmpty())
+    {
+        if (nozzle.IsUnknown())
+        {
+            m_used_time->SetLabel(wxString::Format(_L("Used Time: %s"), "--h"));
+        }
+        else
+        {
+            // Update used time
+            int usedSeconds = nozzle.GetNozzlePrintTime();
+            if (usedSeconds < 60)
+            {
+                m_used_time->SetLabel(wxString::Format(_L("Used Time: %s"), "0 h"));
+            }
+            else
+            {
+                int printTime = (usedSeconds >= 3600 ? usedSeconds / 3600 : usedSeconds / 60);
+                std::string printTimeStr = (usedSeconds >= 3600 ? std::to_string(printTime) + " h" : std::to_string(printTime) + " min");
+                m_used_time->SetLabel(wxString::Format(_L("Used Time: %s"), printTimeStr.c_str()));
+            }
+        }
+
+    }
+}
+
+void wgtDeviceNozzleRackHotendUpdate::Rescale()
+{
+    // update images
+    if (m_nozzle_image) { m_nozzle_image->msw_rescale(); }
+    if (m_nozzle_empty_image) { m_nozzle_empty_image->msw_rescale(); }
+    if (m_nozzle_status == NOZZLE_STATUS_EMPTY && m_nozzle_empty_image)
+    {
+        m_icon_bitmap->SetBitmap(m_nozzle_empty_image->bmp());
+    }
+    else if (m_nozzle_image != nullptr)
+    {
+        m_icon_bitmap->SetBitmap(m_nozzle_image->bmp());
+    }
+    m_icon_bitmap->Refresh();
+}
+
+};// namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.h b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.h
new file mode 100644
index 0000000000..49df93c2c7
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.h
@@ -0,0 +1,175 @@
+//**********************************************************/
+/* File: wgtDeviceNozzleRackUpdate.h
+*  Description: The dialog for reading/upgrading the H2C induction-hotend-rack firmware.
+*
+*  \n class wgtDeviceNozzleRackUpgradeDlg;   // modal "Hotends Info" dialog
+*  \n class wgtDeviceNozzleRackUprade;       // the dialog's content panel (per-nozzle rows)
+*  \n class wgtDeviceNozzleRackHotendUpdate;  // one hotend row (toolhead "R" + rack 1..6)
+*
+*  Opened from the Device-tab rack panel's "Hotends Info" button (wgtDeviceNozzleRack.cpp) and
+*  reused by the Device->Upgrade page "Hotends on Rack" section
+*  (UpgradePanel::createNozzleRackWidgets). All device data + MQTT commands live in
+*  DevNozzleRack / DevNozzleSystem, so this is additive GUI gated behind
+*  DevNozzleRack::IsSupported() — dormant for every non-rack printer.
+//**********************************************************/
+
+#pragma once
+#include "slic3r/GUI/DeviceCore/DevNozzleRack.h"
+
+#include "slic3r/GUI/GUI_Utils.hpp"
+#include "slic3r/GUI/Widgets/StaticBox.hpp"
+#include "slic3r/GUI/Widgets/AnimaController.hpp"
+
+#include <wx/panel.h>
+#include <memory>
+#include <unordered_map>
+#include <vector>
+
+// Previous definitions
+class Button;
+class Label;
+class ScalableBitmap;
+class ScalableButton;
+namespace Slic3r
+{
+    struct DevNozzle;
+    class DevNozzleRack;
+namespace GUI
+{
+    class wgtDeviceNozzleRackUprade;
+    class wgtDeviceNozzleRackHotendUpdate;
+}
+};
+
+namespace Slic3r::GUI
+{
+class wgtDeviceNozzleRackUpgradeDlg : public DPIDialog
+{
+public:
+    wgtDeviceNozzleRackUpgradeDlg(wxWindow* parent, const std::shared_ptr<DevNozzleRack> rack);
+
+public:
+    void UpdateRackInfo(const std::shared_ptr<DevNozzleRack> rack);
+
+public:
+    void on_dpi_changed(const wxRect& suggested_rect) override;
+
+private:
+    wgtDeviceNozzleRackUprade* m_rack_upgrade_panel;
+};
+
+
+class wgtDeviceNozzleRackUprade : public wxPanel
+{
+public:
+    wgtDeviceNozzleRackUprade(wxWindow* parent,
+        wxWindowID id = wxID_ANY,
+        const wxPoint& pos = wxDefaultPosition,
+        const wxSize& size = wxDefaultSize,
+        long style = wxTAB_TRAVERSAL);
+    ~wgtDeviceNozzleRackUprade() = default;
+
+public:
+    void UpdateRackInfo(const std::shared_ptr<DevNozzleRack> rack);
+    void Rescale();
+
+private:
+    void CreateGui();
+
+    void OnBtnReadAll(wxCommandEvent& e);
+
+private:
+    std::weak_ptr<DevNozzleRack> m_nozzle_rack;
+
+    // GUI
+    wgtDeviceNozzleRackHotendUpdate* m_extruder_nozzle_item;
+    std::unordered_map<int, wgtDeviceNozzleRackHotendUpdate*> m_nozzle_items;
+};
+
+// Using for rack nozzle id or extruder nozzle id
+class wgtDeviceNozzleRackHotendUpdate : public StaticBox
+{
+public:
+    wgtDeviceNozzleRackHotendUpdate(wxWindow* parent, const wxString& idx_text);
+
+public:
+    // Color
+    void UpdateColourStyle(const wxColour& clr);
+
+    // extruder nozzle
+    int GetExtruderNozzleId() const { return m_ext_nozzle_id; }
+    void SetExtruderNozzleId(int ext_nozzle_id) { m_ext_nozzle_id = ext_nozzle_id; }
+    void UpdateExtruderNozzleInfo(const std::shared_ptr<DevNozzleRack> rack);
+
+    // rack nozzle
+    void SetRackNozzleId(int rack_nozzle_id) { m_rack_nozzle_id = rack_nozzle_id; }
+    int GetRackNozzleId() const { return m_rack_nozzle_id; }
+    void UpdateRackNozzleInfo(const std::shared_ptr<DevNozzleRack> rack);
+
+    // gui
+    void Rescale();
+
+private:
+    void CreateGui();
+
+    void UpdateInfo(const DevNozzle& nozzle);
+
+    void OnBitmapHoverEnter(wxMouseEvent& event);
+    void OnBitmapHoverLeave(wxMouseEvent& event);
+    void OnStatusIconClick(wxMouseEvent& event);
+    void updateNozzleImage(const DevNozzle& nozzle);
+
+private:
+    enum NozzleStatus : int
+    {
+        NOZZLE_STATUS_DC = -1,
+        NOZZLE_STATUS_EMPTY,
+        NOZZLE_STATUS_NORMAL,
+        NOZZLE_STATUS_ABNORMAL,
+        NOZZLE_STATUS_UNKNOWN,
+    };
+
+private:
+    int m_ext_nozzle_id = -1;
+    int m_rack_nozzle_id = -1;
+    bool m_isRefreshFinish = false;
+    bool findNozzleImage = false;
+
+    NozzleStatus m_nozzle_status = NOZZLE_STATUS_DC;
+    std::weak_ptr<DevNozzleRack> m_nozzle_rack;
+
+    std::vector<std::vector<ScalableBitmap*>> nozzle_hs;
+    std::vector<std::vector<ScalableBitmap*>> nozzle_hh;
+    // GUI
+    ScalableBitmap* m_nozzle_image = nullptr;
+    ScalableBitmap* m_nozzle_empty_image = nullptr;
+    ScalableBitmap* m_scaled_nozzle_image = nullptr;
+    ScalableBitmap* m_scaled_nozzle_empty_image = nullptr;
+    ScalableBitmap* m_refresh_icon = nullptr;
+    AnimaIcon* m_refreshing_icon = nullptr;
+    ScalableBitmap* m_error_icon = nullptr;
+
+    Label* m_idx_label;
+    wxStaticBitmap* m_icon_bitmap{ nullptr };
+    wxStaticBitmap* m_status_bitmap{ nullptr };
+
+    Label* m_material_label{ nullptr };
+    StaticBox* m_colour_box{ nullptr };
+    wxFrame* m_hoverFrame{ nullptr };
+
+    Label* m_status_label{ nullptr };
+    Label* m_used_time{ nullptr };
+
+    Label* m_diameter_label;
+    Label* m_flowtype_label;
+    Label* m_type_label;
+    ScalableButton* m_error_button{ nullptr };
+
+    Label* m_sn_label;
+    Label* m_version_label;
+    Label* m_version_new_label;
+};
+
+wxDECLARE_EVENT(wxEVT_NOZZLE_JUMP_UPGRADE, wxCommandEvent);
+
+};// end of namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.cpp b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.cpp
new file mode 100644
index 0000000000..201b762537
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.cpp
@@ -0,0 +1,289 @@
+//**********************************************************/
+/* File: wgtDeviceNozzleSelect.cpp
+*  Description: The panel to select nozzle
+*
+*  \n class wgtDeviceNozzleSelect;
+//**********************************************************/
+
+#include "wgtDeviceNozzleSelect.h"
+#include "wgtDeviceNozzleRackNozzleItem.h" // the nozzle-item widget lives in its own header
+
+#include "slic3r/GUI/I18N.hpp"
+#include "slic3r/GUI/DeviceTab/wgtMsgBox.h"
+#include "slic3r/GUI/Widgets/Label.hpp"
+
+static wxColour s_gray_clr("#B0B0B0");
+static wxColour s_hgreen_clr("#00AE42");
+static wxColour s_red_clr("#D01B1B");
+
+static std::vector<int> a_nozzle_seq = {16, 18, 20, 17, 19, 21};
+
+wxDEFINE_EVENT(EVT_NOZZLE_SELECT_CHANGED, wxCommandEvent);
+wxDEFINE_EVENT(EVT_NOZZLE_SELECT_CLICKED, wxCommandEvent);
+
+namespace Slic3r::GUI {
+
+wgtDeviceNozzleRackSelect::wgtDeviceNozzleRackSelect(wxWindow *parent) : wxPanel(parent, wxID_ANY) { CreateGui(); }
+
+static wxPanel* s_create_title(wxWindow *parent, const wxString& text)
+{
+    wxPanel *panel = new wxPanel(parent, wxID_ANY);
+
+    auto title  = new Label(panel, text);
+    title->SetFont(::Label::Body_13);
+    title->SetBackgroundColour(*wxWHITE);
+    title->SetForegroundColour(0x909090);
+
+    auto split_line = new wxPanel(panel, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL);
+    split_line->SetBackgroundColour(0xeeeeee);
+    split_line->SetMinSize(wxSize(-1, 1));
+    split_line->SetMaxSize(wxSize(-1, 1));
+
+    wxBoxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
+    sizer->Add(0, 0, 0, wxEXPAND, 0);
+    sizer->Add(title, 0, wxALIGN_CENTER, 0);
+    sizer->Add(split_line, 1, wxALIGN_CENTER_VERTICAL | wxEXPAND, 0);
+    panel->SetSizer(sizer);
+    panel->Layout();
+    return panel;
+}
+
+void wgtDeviceNozzleRackSelect::CreateGui()
+{
+    wxSizer *main_sizer = new wxBoxSizer(wxVERTICAL);
+
+    wxColour tip_bg_clr("#FFF0E0");
+    m_title_tips_dynamic = new wgtMsgBox(this);
+    m_title_tips_dynamic->SetBackgroundColour(tip_bg_clr);
+    m_title_tips_dynamic->SetBorderColor(wxColour("#FF6F00"));
+    m_title_tips_dynamic->SetCornerRadius(1);
+    m_title_tips_dynamic->SetBorderWidth(1);
+    auto text_label = m_title_tips_dynamic->GetTextLabel();
+    text_label->SetFont(::Label::Body_12);
+    text_label->SetForegroundColour("#FF6F00");
+    text_label->SetBackgroundColour(tip_bg_clr);
+    text_label->SetLabel(_L("Dynamic nozzles are allocated on the current plate. Picking hotend is not supported."));
+    text_label->Wrap(FromDIP(300));
+    text_label->Fit();
+    m_title_tips_dynamic->Layout();
+    m_title_tips_dynamic->Refresh();
+
+    // nozzles
+    wxGridSizer *nozzle_sizer = new wxGridSizer(2, 3, FromDIP(10), FromDIP(10));
+    for (auto idx : a_nozzle_seq) {
+        wgtDeviceNozzleRackNozzleItem *nozzle_item = new wgtDeviceNozzleRackNozzleItem(this, idx - 16);
+        nozzle_item->EnableSelect();
+        nozzle_item->Bind(EVT_NOZZLE_RACK_NOZZLE_ITEM_SELECTED, &wgtDeviceNozzleRackSelect::OnNozzleItemSelected, this);
+        m_nozzle_items[idx]                        = nozzle_item;
+        nozzle_sizer->Add(nozzle_item, 0);
+    }
+
+    // toolhead area
+    m_toolhead_nozzle_l = new wgtDeviceNozzleRackNozzleItem(this, 1);
+    m_toolhead_nozzle_l->EnableSelect();
+    m_toolhead_nozzle_l->SetDisplayIdText("L");
+    m_toolhead_nozzle_l->Bind(EVT_NOZZLE_RACK_NOZZLE_ITEM_SELECTED, &wgtDeviceNozzleRackSelect::OnNozzleItemSelected, this);
+
+    m_toolhead_nozzle_r = new wgtDeviceNozzleRackNozzleItem(this, 0);
+    m_toolhead_nozzle_r->EnableSelect();
+    m_toolhead_nozzle_r->SetDisplayIdText("R");
+    m_toolhead_nozzle_r->Bind(EVT_NOZZLE_RACK_NOZZLE_ITEM_SELECTED, &wgtDeviceNozzleRackSelect::OnNozzleItemSelected, this);
+
+    wxSizer* toolhead_sizer = new wxBoxSizer(wxHORIZONTAL);
+    toolhead_sizer->Add(m_toolhead_nozzle_l, 0, wxRIGHT, FromDIP(5));
+    toolhead_sizer->Add(m_toolhead_nozzle_r, 0, wxLEFT, FromDIP(5));
+
+    main_sizer->Add(m_title_tips_dynamic, 0, wxALIGN_CENTRE_VERTICAL | wxBOTTOM, FromDIP(10));
+    main_sizer->Add(s_create_title(this, _L("Hotend Rack")), 0, wxEXPAND);
+    main_sizer->Add(nozzle_sizer, 0, wxTOP | wxBOTTOM | wxALIGN_LEFT, FromDIP(10));
+    main_sizer->Add(s_create_title(this, _L("ToolHead")), 0, wxEXPAND);
+    main_sizer->AddSpacer(FromDIP(10));
+    main_sizer->Add(toolhead_sizer, 0, wxALIGN_LEFT);
+
+    SetBackgroundColour(*wxWHITE);
+    SetSizer(main_sizer);
+    Layout();
+    Fit();
+}
+
+static void s_update_nozzle_info(wgtDeviceNozzleRackNozzleItem* item,
+                                 std::shared_ptr<DevNozzleRack> rack,
+                                 const DevNozzle& nozzle_info)
+{
+    item->Update(rack, nozzle_info.IsOnRack());
+    if (nozzle_info.IsUnknown()) {
+        if (item->GetToolTipText() != _L("Nozzle information needs to be read")) {
+            item->SetToolTip(_L("Nozzle information needs to be read"));
+        }
+    } else {
+        item->SetToolTip(wxEmptyString);
+    }
+}
+
+void wgtDeviceNozzleRackSelect::UpdateNozzleInfos(std::shared_ptr<DevNozzleRack> rack)
+{
+    m_nozzle_rack = rack;
+    if (rack) {
+        s_update_nozzle_info(m_toolhead_nozzle_l, rack, rack->GetNozzleSystem()->GetNozzleByPosId(DEPUTY_EXTRUDER_ID));
+        s_update_nozzle_info(m_toolhead_nozzle_r, rack, rack->GetNozzleSystem()->GetNozzleByPosId(MAIN_EXTRUDER_ID));
+        for (const auto& item : m_nozzle_items) {
+            s_update_nozzle_info(item.second, rack, rack->GetNozzleSystem()->GetNozzleByPosId(item.first));
+        }
+    }
+}
+
+static void s_enable_item_if_match(wgtDeviceNozzleRackNozzleItem* item,
+                                   const DevNozzle& nozzle_info,
+                                   const DevNozzle& selected_nozzle)
+{
+    if (item) {
+        if (nozzle_info.GetLogicExtruderId() != selected_nozzle.GetLogicExtruderId()) {
+            item->SetDisable(true);
+            return;
+        }
+
+        if (!nozzle_info.IsEmpty() && !nozzle_info.IsAbnormal() && !nozzle_info.IsUnknown() &&
+            nozzle_info.GetNozzleType() == selected_nozzle.GetNozzleType() &&
+            nozzle_info.GetNozzleDiameter() == selected_nozzle.GetNozzleDiameter() &&
+            nozzle_info.GetNozzleFlowType() == selected_nozzle.GetNozzleFlowType()) {
+            item->SetDisable(false);
+        } else {
+            item->SetDisable(true);
+        }
+    }
+}
+
+void wgtDeviceNozzleRackSelect::UpdatSelectedNozzle(std::shared_ptr<DevNozzleRack> rack, int selected_nozzle_pos_id)
+{
+    m_nozzle_rack = rack;
+    if (rack) {
+        SetSelectedNozzle(rack->GetNozzleSystem()->GetNozzleByPosId(selected_nozzle_pos_id));
+        if (m_enable_manual_nozzle_pick) {
+            s_enable_item_if_match(m_toolhead_nozzle_r, rack->GetNozzleSystem()->GetNozzleByPosId(MAIN_EXTRUDER_ID), m_selected_nozzle);
+            s_enable_item_if_match(m_toolhead_nozzle_l, rack->GetNozzleSystem()->GetNozzleByPosId(DEPUTY_EXTRUDER_ID), m_selected_nozzle);
+            for (auto& item : m_nozzle_items) {
+                s_enable_item_if_match(item.second, rack->GetNozzleSystem()->GetNozzleByPosId(item.first), m_selected_nozzle);
+            }
+        }
+    }
+}
+
+void wgtDeviceNozzleRackSelect::UpdatSelectedNozzles(std::shared_ptr<DevNozzleRack> rack,
+                                                     std::vector<int> selected_nozzle_pos_vec,
+                                                     bool use_dynamic_switch,
+                                                     std::optional<PrintFromType> /*print_from_type*/)
+{
+    m_nozzle_rack = rack;
+    m_enable_manual_nozzle_pick = !use_dynamic_switch;
+    m_title_tips_dynamic->Show(use_dynamic_switch);
+
+    UpdateNozzleInfos(rack);
+    if (!use_dynamic_switch) {
+        if (selected_nozzle_pos_vec.size() > 0) {
+            return UpdatSelectedNozzle(rack, selected_nozzle_pos_vec.at(0));
+        } else {
+            return ClearSelection();
+        }
+    }
+
+    if (rack) {
+        ClearSelection();
+        for (const auto& pos_id : selected_nozzle_pos_vec) {
+            if (pos_id == MAIN_EXTRUDER_ID) {
+                m_toolhead_nozzle_r->SetSelected(true);
+            } else if (pos_id == DEPUTY_EXTRUDER_ID) {
+                m_toolhead_nozzle_l->SetSelected(true);
+            } else if (auto it = m_nozzle_items.find(pos_id); it != m_nozzle_items.end()) {
+                it->second->SetSelected(true);
+            }
+        }
+
+        if (!m_toolhead_nozzle_l->IsSelected()) {
+            m_toolhead_nozzle_l->SetDisable(true);
+        }
+
+        if (!m_toolhead_nozzle_r->IsSelected()) {
+            m_toolhead_nozzle_r->SetDisable(true);
+        }
+
+        for (const auto& item : m_nozzle_items) {
+            if (!item.second->IsSelected()) {
+                item.second->SetDisable(true);
+            }
+        }
+    }
+}
+
+void wgtDeviceNozzleRackSelect::ClearSelection()
+{
+    m_selected_nozzle = DevNozzle();
+    m_toolhead_nozzle_l->SetSelected(false);
+    m_toolhead_nozzle_r->SetSelected(false);
+    for (auto &item : m_nozzle_items) { item.second->SetSelected(false); }
+}
+
+void wgtDeviceNozzleRackSelect::SetSelectedNozzle(const DevNozzle &nozzle)
+{
+    int new_selected_pos_id = nozzle.GetNozzlePosId();
+    if (m_selected_nozzle.GetNozzlePosId() != new_selected_pos_id) {
+        ClearSelection();
+
+        m_selected_nozzle = nozzle;
+        if (new_selected_pos_id == MAIN_EXTRUDER_ID) {
+            m_toolhead_nozzle_r->SetSelected(true);
+        } else if (new_selected_pos_id == DEPUTY_EXTRUDER_ID) {
+            m_toolhead_nozzle_l->SetSelected(true);
+        } else if (auto it = m_nozzle_items.find(m_selected_nozzle.GetNozzlePosId()); it != m_nozzle_items.end()) {
+            it->second->SetSelected(true);
+        }
+    }
+}
+
+volatile int sGetNozzlePosId(wgtDeviceNozzleRackNozzleItem* item,
+                             wgtDeviceNozzleRackNozzleItem* l_item,
+                             wgtDeviceNozzleRackNozzleItem* r_item)
+{
+    int to_select_pos_id = -1;
+    if (item == l_item) {
+        to_select_pos_id = DEPUTY_EXTRUDER_ID;
+    } else if (item == r_item) {
+        to_select_pos_id = MAIN_EXTRUDER_ID;
+    } else {
+        to_select_pos_id = item->GetNozzleId() + 0x10;
+    }
+
+    return to_select_pos_id;
+}
+
+void wgtDeviceNozzleRackSelect::OnNozzleItemSelected(wxCommandEvent &evt)
+{
+    if (!m_enable_manual_nozzle_pick) {
+        return;
+    }
+
+    auto *item = dynamic_cast<wgtDeviceNozzleRackNozzleItem *>(evt.GetEventObject());
+    if (item; auto ptr = m_nozzle_rack.lock()) {
+        int to_select_pos_id = sGetNozzlePosId(item, m_toolhead_nozzle_l, m_toolhead_nozzle_r);
+        if (to_select_pos_id > -1 && to_select_pos_id != GetSelectedNozzlePosID()) {
+            SetSelectedNozzle(ptr->GetNozzleSystem()->GetNozzleByPosId(to_select_pos_id));
+            wxCommandEvent change_evt(EVT_NOZZLE_SELECT_CHANGED, GetId());
+            change_evt.SetEventObject(this);
+            ProcessEvent(change_evt);
+            evt.Skip();
+        } else {
+            wxCommandEvent change_evt(EVT_NOZZLE_SELECT_CLICKED, GetId());
+            change_evt.SetEventObject(this);
+            ProcessEvent(change_evt);
+            evt.Skip();
+        }
+    }
+}
+
+void wgtDeviceNozzleRackSelect::Rescale()
+{
+    m_toolhead_nozzle_l->Rescale();
+    m_toolhead_nozzle_r->Rescale();
+    for (auto &item : m_nozzle_items) { item.second->Rescale(); }
+}
+
+}; // namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.h b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.h
new file mode 100644
index 0000000000..43f3378ff2
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.h
@@ -0,0 +1,74 @@
+//**********************************************************/
+/* File: wgtDeviceNozzleSelect.h
+*  Description: The panel to select nozzle
+*
+*  \n class wgtDeviceNozzleSelect;
+//**********************************************************/
+
+#pragma once
+
+#include "slic3r/GUI/DeviceCore/DevNozzleSystem.h" // DevNozzle (value member) + DevDefs.h (PrintFromType, MAIN/DEPUTY_EXTRUDER_ID)
+
+#include <wx/panel.h>
+
+#include <memory>
+#include <optional>
+#include <unordered_map>
+#include <vector>
+
+// Previous definitions
+class Label;
+namespace Slic3r
+{
+    struct DevNozzle;
+    class DevNozzleRack;
+namespace GUI
+{
+    class wgtDeviceNozzleRackNozzleItem;
+    class wgtMsgBox;
+}
+};
+
+wxDECLARE_EVENT(EVT_NOZZLE_SELECT_CHANGED, wxCommandEvent);
+wxDECLARE_EVENT(EVT_NOZZLE_SELECT_CLICKED, wxCommandEvent);
+namespace Slic3r::GUI
+{
+class wgtDeviceNozzleRackSelect : public wxPanel
+{
+public:
+    wgtDeviceNozzleRackSelect(wxWindow* parent);
+    ~wgtDeviceNozzleRackSelect() = default;
+
+public:
+    int  GetSelectedNozzlePosID() const { return m_selected_nozzle.GetNozzlePosId();}
+    void UpdatSelectedNozzles(std::shared_ptr<DevNozzleRack> rack, std::vector<int> selected_nozzle_pos_vec, bool use_dynamic_switch, std::optional<PrintFromType> print_from_type);// for slicing with dynamic switch
+    void Rescale();
+
+private:
+    void CreateGui();
+
+    void ClearSelection();
+    void SetSelectedNozzle(const DevNozzle &nozzle);
+    void UpdatSelectedNozzle(std::shared_ptr<DevNozzleRack> rack, int selected_nozzle_pos_id = -1); // for slicing without dynamic switch
+
+    void UpdateNozzleInfos(std::shared_ptr<DevNozzleRack> rack);
+
+    void OnNozzleItemSelected(wxCommandEvent& evt);
+
+private:
+    DevNozzle                    m_selected_nozzle;
+    std::weak_ptr<DevNozzleRack> m_nozzle_rack;
+
+    // pick
+    bool m_enable_manual_nozzle_pick = true;
+
+    // Label
+    wgtMsgBox* m_title_tips_dynamic;
+
+    // GUI
+    wgtDeviceNozzleRackNozzleItem * m_toolhead_nozzle_l{nullptr};
+    wgtDeviceNozzleRackNozzleItem * m_toolhead_nozzle_r{nullptr};
+    std::unordered_map<int, wgtDeviceNozzleRackNozzleItem *> m_nozzle_items; // from 16 to 21
+};
+
+};// end of namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtMsgBox.cpp b/src/slic3r/GUI/DeviceTab/wgtMsgBox.cpp
new file mode 100644
index 0000000000..22ee189777
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtMsgBox.cpp
@@ -0,0 +1,43 @@
+#include "wgtMsgBox.h"
+
+#include "slic3r/GUI/GUI_App.hpp"
+#include "slic3r/GUI/Widgets/Label.hpp"
+#include "slic3r/GUI/wxExtensions.hpp"
+
+#include <wx/sizer.h>
+
+namespace Slic3r::GUI
+{
+
+wgtMsgBox::wgtMsgBox(wxWindow* parent)
+    : StaticBox(parent, wxID_ANY)
+{
+    CreateGUI();
+}
+
+void wgtMsgBox::CreateGUI()
+{
+    wxBoxSizer* mainSizer = new wxBoxSizer(wxHORIZONTAL);
+
+    m_txt_label = new Label(this);
+    m_txt_label->SetFont(::Label::Body_13);
+    m_txt_label->SetBackgroundColour(*wxWHITE);
+
+    auto padding_sizer = new wxBoxSizer(wxHORIZONTAL);
+    padding_sizer->Add(m_txt_label, 0, wxALIGN_CENTER_VERTICAL | wxALL, FromDIP(5));
+    mainSizer->Add(padding_sizer, 0, wxALIGN_CENTER_VERTICAL | wxALL, 1);
+
+    //Button* btnClose = CreateCloseButton();
+    //wxButton* btnClose = CreateCloseButton();
+    //mainSizer->Add(btnClose, 0, wxALIGN_CENTER_VERTICAL);
+
+    SetSizer(mainSizer);
+    mainSizer->Fit(this);
+}
+
+void wgtMsgBox::OnCloseClicked(wxCommandEvent& evt)
+{
+    this->Hide();
+}
+
+} // namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/DeviceTab/wgtMsgBox.h b/src/slic3r/GUI/DeviceTab/wgtMsgBox.h
new file mode 100644
index 0000000000..0668893d09
--- /dev/null
+++ b/src/slic3r/GUI/DeviceTab/wgtMsgBox.h
@@ -0,0 +1,31 @@
+#ifndef WGTMSGBOX_H
+#define WGTMSGBOX_H
+
+#include <wx/wx.h>
+#include <wx/panel.h>
+#include <wx/stattext.h>
+#include <wx/button.h>
+
+#include "slic3r/GUI/Widgets/StaticBox.hpp"
+
+class Label;
+namespace Slic3r::GUI
+{
+class wgtMsgBox : public StaticBox
+{
+public:
+    wgtMsgBox(wxWindow* parent);
+
+public:
+    Label* GetTextLabel() const { return m_txt_label; }
+
+private:
+    Label* m_txt_label;
+
+private:
+    void CreateGUI();
+    void OnCloseClicked(wxCommandEvent& evt);
+};
+}
+
+#endif // WGTMSGBOX_H
diff --git a/src/slic3r/GUI/FilamentMapDialog.cpp b/src/slic3r/GUI/FilamentMapDialog.cpp
index a514494af1..72428dae02 100644
--- a/src/slic3r/GUI/FilamentMapDialog.cpp
+++ b/src/slic3r/GUI/FilamentMapDialog.cpp
@@ -138,7 +138,8 @@ FilamentMapDialog::FilamentMapDialog(wxWindow                       *parent,
 
     if (mode < fmmManual)
         m_page_type = PageType::ptAuto;
-    else if (mode == fmmManual)
+    else if (mode == fmmManual || mode == fmmNozzleManual)
+        // Orca: there is no dedicated nozzle-manual page, so treat an fmmNozzleManual plate as a manual variant and show the Custom page instead of misfiling it as "Same as Global".
         m_page_type = PageType::ptManual;
     else
         m_page_type = PageType::ptDefault;
diff --git a/src/slic3r/GUI/FilamentMapPanel.cpp b/src/slic3r/GUI/FilamentMapPanel.cpp
index 59f6e5be6e..250851e556 100644
--- a/src/slic3r/GUI/FilamentMapPanel.cpp
+++ b/src/slic3r/GUI/FilamentMapPanel.cpp
@@ -1,5 +1,7 @@
 #include "FilamentMapPanel.hpp"
 #include "GUI_App.hpp"
+#include "Widgets/MultiNozzleSync.hpp" // manuallySetNozzleCount producer for extruder_nozzle_stats
+#include <algorithm>
 #include <wx/dcbuffer.h>
 #include <wx/utils.h>
 #include "wx/graphics.h"
@@ -72,6 +74,33 @@ FilamentMapManualPanel::FilamentMapManualPanel(wxWindow                       *p
 
     m_switch_btn->Bind(wxEVT_BUTTON, &FilamentMapManualPanel::OnSwitchFilament, this);
 
+    // Multi-nozzle: give the user a reachable way to declare, per extruder, how many
+    // physical nozzles of each volume type a multi-nozzle extruder carries. This is the
+    // fallback "manual" producer of the extruder_nozzle_stats config (the full device nozzle-rack
+    // auto-sync is deferred). Gated on the edited printer preset having an extruder with
+    // extruder_max_nozzle_count > 1, so the trigger is not even created for any single-nozzle or
+    // dual-extruder ({1,1}, H2D) printer - zero UI change for every existing profile.
+    auto *max_nozzle_counts_opt = wxGetApp().preset_bundle->printers.get_edited_preset().config.option<ConfigOptionIntsNullable>("extruder_max_nozzle_count");
+    // Skip nil entries: a nullable-int nil is INT_MAX (> 1) and would otherwise falsely pass the gate.
+    if (max_nozzle_counts_opt &&
+        std::any_of(max_nozzle_counts_opt->values.begin(), max_nozzle_counts_opt->values.end(),
+                    [](int v) { return v > 1 && v != ConfigOptionIntsNullable::nil_value(); })) {
+        auto *set_count_link = new Label(this, _L("Set the physical nozzle count..."));
+        set_count_link->SetFont(Label::Body_14);
+        set_count_link->SetForegroundColour(BorderSelectedColor);
+        set_count_link->SetCursor(wxCursor(wxCURSOR_HAND));
+        top_sizer->AddSpacer(FromDIP(8));
+        top_sizer->Add(set_count_link, 0, wxALIGN_LEFT | wxLEFT, FromDIP(15));
+        const std::vector<int> max_counts = max_nozzle_counts_opt->values;
+        set_count_link->Bind(wxEVT_LEFT_DOWN, [max_counts](wxMouseEvent &evt) {
+            for (int extruder_id = 0; extruder_id < (int) max_counts.size(); ++extruder_id) {
+                if (max_counts[extruder_id] > 1)
+                    GUI::manuallySetNozzleCount(extruder_id);
+            }
+            evt.Skip();
+        });
+    }
+
     SetSizer(top_sizer);
     Layout();
     Fit();
diff --git a/src/slic3r/GUI/GCodeViewer.cpp b/src/slic3r/GUI/GCodeViewer.cpp
index bb9de4976f..0f86ff903f 100644
--- a/src/slic3r/GUI/GCodeViewer.cpp
+++ b/src/slic3r/GUI/GCodeViewer.cpp
@@ -2911,8 +2911,11 @@ void GCodeViewer::render_legend_color_arr_recommen(float window_padding)
 
     float delta_weight_to_single_ext = stats_by_extruder.stats_by_single_extruder.filament_flush_weight - stats_by_extruder.stats_by_multi_extruder_curr.filament_flush_weight;
     float delta_weight_to_best = stats_by_extruder.stats_by_multi_extruder_curr.filament_flush_weight - stats_by_extruder.stats_by_multi_extruder_best.filament_flush_weight;
-    int   delta_change_to_single_ext = stats_by_extruder.stats_by_single_extruder.filament_change_count - stats_by_extruder.stats_by_multi_extruder_curr.filament_change_count;
-    int   delta_change_to_best = stats_by_extruder.stats_by_multi_extruder_curr.filament_change_count - stats_by_extruder.stats_by_multi_extruder_best.filament_change_count;
+    // The displayed "hand changes" delta uses the per-nozzle flush_filament_change_count.
+    // For single-nozzle-per-extruder printers it equals the per-extruder filament_change_count,
+    // so the shown value is unchanged.
+    int   delta_change_to_single_ext = stats_by_extruder.stats_by_single_extruder.flush_filament_change_count - stats_by_extruder.stats_by_multi_extruder_curr.flush_filament_change_count;
+    int   delta_change_to_best = stats_by_extruder.stats_by_multi_extruder_curr.flush_filament_change_count - stats_by_extruder.stats_by_multi_extruder_best.flush_filament_change_count;
 
     bool any_less_to_single_ext = delta_weight_to_single_ext > EPSILON || delta_change_to_single_ext > 0;
     bool any_more_to_best = delta_weight_to_best > EPSILON || delta_change_to_best > 0;
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index c250d96f44..5eda0f7f06 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -8136,6 +8136,11 @@ void GLCanvas3D::_render_objects(GLVolumeCollection::ERenderType type, bool with
         shader = wxGetApp().get_shader("gouraud");
     ECanvasType canvas_type = this->m_canvas_type;
     bool                 partly_inside_enable = canvas_type == ECanvasType::CanvasAssembleView ? false : true;
+    // The edited printer's per-extruder printable heights feed the object shader's
+    // extruder_printable_heights uniform. Empty for single-extruder printers, so the shader flag stays
+    // 0.0 and rendering is pixel-identical there (see GLVolumeCollection::render).
+    auto printable_height_option = wxGetApp().preset_bundle->printers.get_edited_preset().config.option<ConfigOptionFloatsNullable>("extruder_printable_height");
+    std::vector<double>* printable_heights = printable_height_option ? &printable_height_option->values : nullptr;
     if (shader != nullptr) {
         shader->start_using();
 
@@ -8183,7 +8188,7 @@ void GLCanvas3D::_render_objects(GLVolumeCollection::ERenderType type, bool with
                             return (m_render_sla_auxiliaries || volume.composite_id.volume_id >= 0);
                         }
                         },
-                        partly_inside_enable);
+                        partly_inside_enable, printable_heights);
                 }
             }
             else {
@@ -8218,7 +8223,7 @@ void GLCanvas3D::_render_objects(GLVolumeCollection::ERenderType type, bool with
                     return true;
                 }
                 },
-                partly_inside_enable);
+                partly_inside_enable, printable_heights);
             if (m_canvas_type == CanvasAssembleView && m_gizmos.m_assemble_view_data->model_objects_clipper()->get_position() > 0) {
                 const GLGizmosManager& gm = get_gizmos_manager();
                 shader->stop_using();
diff --git a/src/slic3r/GUI/Monitor.cpp b/src/slic3r/GUI/Monitor.cpp
index dff8cdc15b..ccec5048f2 100644
--- a/src/slic3r/GUI/Monitor.cpp
+++ b/src/slic3r/GUI/Monitor.cpp
@@ -518,6 +518,16 @@ void MonitorPanel::jump_to_HMS()
         m_tabpanel->SetSelection(PT_HMS);
 }
 
+void MonitorPanel::jump_to_Upgrade()
+{
+    if (this->IsShown()) {
+        auto page = m_tabpanel->GetCurrentPage();
+        if (page && page != m_upgrade_panel) {
+            m_tabpanel->SetSelection(PT_UPDATE);
+        }
+    }
+}
+
 void MonitorPanel::jump_to_LiveView()
 {
     if (!this->IsShown()) { return; }
diff --git a/src/slic3r/GUI/Monitor.hpp b/src/slic3r/GUI/Monitor.hpp
index b7502b9d51..cf050068b6 100644
--- a/src/slic3r/GUI/Monitor.hpp
+++ b/src/slic3r/GUI/Monitor.hpp
@@ -156,6 +156,7 @@ public:
 
 
     void jump_to_HMS();
+    void jump_to_Upgrade();
     void jump_to_LiveView();
     void update_network_version_footer();
 };
diff --git a/src/slic3r/GUI/MsgDialog.cpp b/src/slic3r/GUI/MsgDialog.cpp
index 724e54c2f7..ed76c822f1 100644
--- a/src/slic3r/GUI/MsgDialog.cpp
+++ b/src/slic3r/GUI/MsgDialog.cpp
@@ -19,6 +19,7 @@
 #include "I18N.hpp"
 //#include "ConfigWizard.hpp"
 #include "wxExtensions.hpp"
+#include "Widgets/Label.hpp"
 #include "slic3r/GUI/MainFrame.hpp"
 #include "GUI_App.hpp"
 #define MSG_DLG_MAX_SIZE wxSize(-1, FromDIP(464))//notice:ban setting the maximum width value
@@ -750,6 +751,47 @@ NetworkErrorDialog::NetworkErrorDialog(wxWindow* parent)
     Centre(wxBOTH);
 }
 
+
+FilamentWarningDialog::FilamentWarningDialog(wxWindow *parent, const wxString &title, std::vector<FilamentWarningInfo> infos)
+    : MsgDialog(parent, title.IsEmpty() ? wxString::Format(_L("%s warning"), SLIC3R_APP_FULL_NAME) : title, wxEmptyString, wxOK | wxICON_WARNING), m_messages(infos)
+{
+    BuildContent();
+    finalize();
+}
+
+void FilamentWarningDialog::BuildContent()
+{
+    wxBoxSizer *messages_sizer = new wxBoxSizer(wxVERTICAL);
+
+    int message_count = 0;
+    for (int i = 0; i < m_messages.size(); i++)
+    {
+        const wxString &message  = m_messages[i].info_msg;
+        const wxString &wiki_url = m_messages[i].wiki_url;
+        if (message_count > 0) { messages_sizer->AddSpacer(FromDIP(10)); }
+
+        if (wiki_url.IsEmpty()) {
+            // No wiki link - just display as regular text
+            Label *text = new Label(this, message);
+            text->SetFont(::Label::Body_12);
+            text->Wrap(FromDIP(400));
+            messages_sizer->Add(text, 0, wxEXPAND | wxLEFT | wxRIGHT, FromDIP(5));
+        } else {
+            Label *link = new Label(this, message + " " + _L("Please refer to Wiki before use->"));
+            link->SetForegroundColour(wxColour(8, 153, 46));
+            link->SetFont(::Label::Body_12);
+            link->Wrap(FromDIP(400));
+            link->Bind(wxEVT_ENTER_WINDOW, [this](auto &e) { SetCursor(wxCURSOR_HAND); });
+            link->Bind(wxEVT_LEAVE_WINDOW, [this](auto &e) { SetCursor(wxCURSOR_ARROW); });
+            link->Bind(wxEVT_LEFT_DOWN, [wiki_url](auto &event) { wxLaunchDefaultBrowser(wiki_url); });
+            messages_sizer->Add(link, 0, wxEXPAND | wxLEFT | wxRIGHT, FromDIP(5));
+        }
+        message_count++;
+    }
+
+    content_sizer->Add(messages_sizer, 1, wxEXPAND | wxALL, FromDIP(5));
+}
+
 } // namespace GUI
 
 } // namespace Slic3r
diff --git a/src/slic3r/GUI/MsgDialog.hpp b/src/slic3r/GUI/MsgDialog.hpp
index a385fbaa13..174d734336 100644
--- a/src/slic3r/GUI/MsgDialog.hpp
+++ b/src/slic3r/GUI/MsgDialog.hpp
@@ -67,6 +67,10 @@ struct MsgDialog : DPIDialog
 	bool get_checkbox_state();
 	virtual void on_dpi_changed(const wxRect& suggested_rect);
 	void SetButtonLabel(wxWindowID btn_id, const wxString& label, bool set_focus = false);
+	// Public wrapper around add_button — lets callers append custom-labelled choice buttons to an
+	// already-constructed dialog (used by the H2C rack hotend "Jump to the upgrade page" prompt).
+	// Purely additive; existing dialogs are unaffected.
+	void AddButton(wxWindowID btn_id, const wxString& label, bool set_focus = false) { add_button(btn_id, set_focus, label); }
 
 protected:
 	enum {
@@ -434,6 +438,32 @@ public:
     bool m_show_again{false};
 };
 
+// Multi-item filament-blacklist warning dialog with per-item wiki links. Replaces the plain
+// MessageDialog used for warnings so stacked accumulate-all warnings render with their own
+// optional Wiki link.
+struct FilamentWarningInfo
+{
+   wxString info_msg;
+   wxString wiki_url;
+};
+
+class FilamentWarningDialog : public MsgDialog
+{
+public:
+    FilamentWarningDialog(wxWindow *parent, const wxString &title, std::vector<FilamentWarningInfo> infos);
+    FilamentWarningDialog(FilamentWarningDialog &&)                 = delete;
+    FilamentWarningDialog(const FilamentWarningDialog &)            = delete;
+    FilamentWarningDialog &operator=(FilamentWarningDialog &&)      = delete;
+    FilamentWarningDialog &operator=(const FilamentWarningDialog &) = delete;
+    virtual ~FilamentWarningDialog()                                = default;
+
+private:
+    void BuildContent();
+
+private:
+    std::vector<FilamentWarningInfo> m_messages;
+};
+
 }
 }
 
diff --git a/src/slic3r/GUI/PartPlate.cpp b/src/slic3r/GUI/PartPlate.cpp
index 18d6e17b33..8dd3ce4d78 100644
--- a/src/slic3r/GUI/PartPlate.cpp
+++ b/src/slic3r/GUI/PartPlate.cpp
@@ -3,7 +3,9 @@
 #include <numeric>
 #include <vector>
 #include <string>
+#include <sstream>
 #include <regex>
+#include "libslic3r/MultiNozzleUtils.hpp"
 #include <future>
 #include <glad/gl.h>
 #include <boost/algorithm/string.hpp>
@@ -66,6 +68,8 @@ static const int PARTPLATE_PLATENAME_OFFSET_Y  = 10;
 const float WIPE_TOWER_DEFAULT_X_POS = 165.;
 const float WIPE_TOWER_DEFAULT_Y_POS = 250.;  // Max y
 
+const float N9_WIPE_TOWER_DEFAULT_Y_POS = 160.;
+
 const float I3_WIPE_TOWER_DEFAULT_X_POS = 0.;
 const float I3_WIPE_TOWER_DEFAULT_Y_POS = 250.; // Max y
 
@@ -4221,6 +4225,12 @@ void PartPlateList::set_default_wipe_tower_pos_for_plate(int plate_idx, bool ini
         y = I3_WIPE_TOWER_DEFAULT_Y_POS;
     }
 
+    std::string printer_type = wxGetApp().preset_bundle->printers.get_edited_preset().get_printer_type(wxGetApp().preset_bundle);
+    // Note: printer_type == "N9" and printer_structure_opt->value == PrinterStructure::psI3 can both be true
+    if (printer_type == "N9") {
+        y = N9_WIPE_TOWER_DEFAULT_Y_POS;
+    }
+
     PartPlate *part_plate = get_plate(plate_idx);
     Vec3d plate_origin = part_plate->get_origin();
     BoundingBoxf3 plate_bbox = part_plate->get_bounding_box();
@@ -6279,6 +6289,58 @@ int PartPlateList::load_from_3mf_structure(PlateDataPtrs& plate_data_list, int f
 		m_plate_list[index]->slice_filaments_info = plate_data_list[i]->slice_filaments_info;
 		gcode_result->warnings = plate_data_list[i]->warnings;
         gcode_result->filament_maps = plate_data_list[i]->filament_maps;
+
+        // Reconstruct the device-side nozzle grouping from the loaded 3mf so
+        // the monitor/preview can map filaments to physical nozzles.
+        // load_nozzle_infos_with_compatibility handles older single-nozzle 3mf (no <nozzle> tags) by
+        // falling back to the per-filament group_id, then to the extruder volume types / nozzle diameters.
+        {
+            // nozzle_volume_types is space-separated ints; nozzle_diameters is comma/space-separated floats.
+            auto parse_int_tokens = [](const std::string& str) -> std::vector<int> {
+                std::vector<int> out;
+                std::istringstream iss(str);
+                std::string tok;
+                while (iss >> tok) { try { out.push_back(std::stoi(tok)); } catch (...) {} }
+                return out;
+            };
+            auto parse_double_tokens = [](const std::string& str) -> std::vector<double> {
+                std::vector<double> out;
+                std::string s = str;
+                std::replace(s.begin(), s.end(), ',', ' ');
+                std::istringstream iss(s);
+                std::string tok;
+                while (iss >> tok) { try { out.push_back(std::stod(tok)); } catch (...) {} }
+                return out;
+            };
+
+            std::vector<int>    nozzle_volume_type_values = parse_int_tokens(plate_data_list[i]->nozzle_volume_types);
+            std::vector<double> nozzle_diameter_values    = parse_double_tokens(plate_data_list[i]->nozzle_diameters);
+
+            std::vector<NozzleVolumeType> extruder_volume_types(nozzle_volume_type_values.size(), NozzleVolumeType::nvtStandard);
+            for (size_t idx = 0; idx < nozzle_volume_type_values.size(); ++idx)
+                if (nozzle_volume_type_values[idx] >= 0 && nozzle_volume_type_values[idx] <= nvtMaxNozzleVolumeType)
+                    extruder_volume_types[idx] = static_cast<NozzleVolumeType>(nozzle_volume_type_values[idx]);
+
+            auto nozzle_infos = MultiNozzleUtils::load_nozzle_infos_with_compatibility(
+                plate_data_list[i]->nozzles_info,
+                plate_data_list[i]->slice_filaments_info,
+                plate_data_list[i]->filament_maps,
+                extruder_volume_types,
+                nozzle_diameter_values);
+
+            std::vector<int> fil_seq(plate_data_list[i]->filament_change_sequence.begin(), plate_data_list[i]->filament_change_sequence.end());
+            std::vector<int> noz_seq(plate_data_list[i]->nozzle_change_sequence.begin(), plate_data_list[i]->nozzle_change_sequence.end());
+            bool enable_filament_dynamic_map = false;
+            if (plate_data_list[i]->config.has("enable_filament_dynamic_map"))
+                enable_filament_dynamic_map = plate_data_list[i]->config.option<ConfigOptionBool>("enable_filament_dynamic_map")->value;
+
+            auto group_result = MultiNozzleUtils::StaticNozzleGroupResult::create(
+                plate_data_list[i]->slice_filaments_info, nozzle_infos, fil_seq, noz_seq, enable_filament_dynamic_map);
+            if (group_result)
+                gcode_result->nozzle_group_result = std::make_shared<MultiNozzleUtils::StaticNozzleGroupResult>(group_result.value());
+            else
+                gcode_result->nozzle_group_result = nullptr;
+        }
 		if (m_plater && !plate_data_list[i]->thumbnail_file.empty()) {
 			BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": plate %1%, load thumbnail from %2%.")%(i+1) %plate_data_list[i]->thumbnail_file;
 			if (boost::filesystem::exists(plate_data_list[i]->thumbnail_file)) {
@@ -6438,9 +6500,10 @@ void PartPlateList::init_bed_type_info()
     auto bed_texture_maps        = wxGetApp().plater()->get_bed_texture_maps();
     std::string bottom_texture_end_name = bed_texture_maps.find("bottom_texture_end_name") != bed_texture_maps.end() ? bed_texture_maps["bottom_texture_end_name"] : "";
     std::string bottom_texture_rect_str = bed_texture_maps.find("bottom_texture_rect") != bed_texture_maps.end() ? bed_texture_maps["bottom_texture_rect"] : "";
+    std::string bottom_texture_rect_longer_str = bed_texture_maps.find("bottom_texture_rect_longer") != bed_texture_maps.end() ? bed_texture_maps["bottom_texture_rect_longer"] : "";
     std::string middle_texture_rect_str = bed_texture_maps.find("middle_texture_rect") != bed_texture_maps.end() ? bed_texture_maps["middle_texture_rect"] : "";
     std::string use_double_extruder_default_texture = bed_texture_maps.find("use_double_extruder_default_texture") != bed_texture_maps.end() ? bed_texture_maps["use_double_extruder_default_texture"] : "";
-    std::array<float, 4>        bottom_texture_rect = {0, 0, 0, 0}, middle_texture_rect = {0, 0, 0, 0};
+    std::array<float, 4>        bottom_texture_rect = {0, 0, 0, 0}, bottom_texture_rect_longer = {0, 0, 0, 0}, middle_texture_rect = {0, 0, 0, 0};
     if (bottom_texture_rect_str.size() > 0) {
         std::vector<std::string> items;
         boost::algorithm::erase_all(bottom_texture_rect_str, " ");
@@ -6451,6 +6514,16 @@ void PartPlateList::init_bed_type_info()
             }
         }
     }
+    if (bottom_texture_rect_longer_str.size() > 0) {
+        std::vector<std::string> items;
+        boost::algorithm::erase_all(bottom_texture_rect_longer_str, " ");
+        boost::split(items, bottom_texture_rect_longer_str, boost::is_any_of(","));
+        if (items.size() == 4) {
+            for (int i = 0; i < items.size(); i++) {
+                bottom_texture_rect_longer[i] = std::atof(items[i].c_str());
+            }
+        }
+    }
     if (middle_texture_rect_str.size() > 0) {
         std::vector<std::string> items;
         boost::algorithm::erase_all(middle_texture_rect_str, " ");
@@ -6471,6 +6544,7 @@ void PartPlateList::init_bed_type_info()
         }
         pte_part2 = BedTextureInfo::TexturePart(45, -14.5, 70, 8, "bbl_bed_pte_left_bottom.svg");
         auto &bottom_rect = bottom_texture_rect;
+        auto &bottom_rect_longer = bottom_texture_rect_longer;
         if (bottom_texture_end_name.size() > 0 && bottom_rect[2] > 0.f) {
             std::string pte_part2_name = "bbl_bed_pte_bottom_" + bottom_texture_end_name + ".svg";
             pte_part2 = BedTextureInfo::TexturePart(bottom_rect[0], bottom_rect[1], bottom_rect[2], bottom_rect[3], pte_part2_name);
@@ -6494,6 +6568,9 @@ void PartPlateList::init_bed_type_info()
         if (bottom_texture_end_name.size() > 0 && bottom_rect[2] > 0.f) {
             std::string st_part2_name = "bbl_bed_st_bottom_" + bottom_texture_end_name + ".svg";
             st_part2                   = BedTextureInfo::TexturePart(bottom_rect[0], bottom_rect[1], bottom_rect[2], bottom_rect[3], st_part2_name);
+        } else if (bottom_rect_longer[2] > 0.f) {
+            // SuperTack bottom strip uses the wider "longer" rect.
+            st_part2.update_pos(bottom_rect_longer[0], bottom_rect_longer[1], bottom_rect_longer[2], bottom_rect_longer[3]);
         }
 
         ep_part1 = BedTextureInfo::TexturePart(57, 300, 236.12f, 10.f, "bbl_bed_ep_middle.svg");
@@ -6504,6 +6581,9 @@ void PartPlateList::init_bed_type_info()
         if (bottom_texture_end_name.size() > 0 && bottom_rect[2] > 0.f) {
             std::string ep_part2_name = "bbl_bed_ep_bottom_" + bottom_texture_end_name + ".svg";
             ep_part2                   = BedTextureInfo::TexturePart(bottom_rect[0], bottom_rect[1], bottom_rect[2], bottom_rect[3], ep_part2_name);
+        } else if (bottom_rect_longer[2] > 0.f) {
+            // Engineering-plate bottom strip uses the wider "longer" rect.
+            ep_part2.update_pos(bottom_rect_longer[0], bottom_rect_longer[1], bottom_rect_longer[2], bottom_rect_longer[3]);
         }
 
         pc_part1 = BedTextureInfo::TexturePart(57, 300, 236.12f, 10.f, "bbl_bed_pc_middle.svg");
diff --git a/src/slic3r/GUI/PartPlate.hpp b/src/slic3r/GUI/PartPlate.hpp
index d4c5399142..bf8304ffb4 100644
--- a/src/slic3r/GUI/PartPlate.hpp
+++ b/src/slic3r/GUI/PartPlate.hpp
@@ -668,6 +668,12 @@ public:
                 this->filename  = part.filename;
                 this->texture   = part.texture;
             }
+            void update_pos(float xx, float yy, float ww, float hh) {
+                x = xx;
+                y = yy;
+                w = ww;
+                h = hh;
+            }
             void update_file(std::string file) {
                 filename = file;
             }
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index a4a4b9a98e..e0545a83e9 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -122,6 +122,8 @@
 #include "NotificationManager.hpp"
 #include "PresetComboBoxes.hpp"
 #include "MsgDialog.hpp"
+#include "Widgets/MultiNozzleSync.hpp"           // NozzleOption, tryPopUpMultiNozzleDialog, setExtruderNozzleCount
+#include "DeviceCore/DevNozzleSystem.h"          // DevNozzle, GetExtNozzles / GetRackNozzles
 #include "ProjectDirtyStateManager.hpp"
 #include "Gizmos/GLGizmoSimplify.hpp" // create suggestion notification
 #include "Gizmos/GLGizmoSVG.hpp" // Drop SVG file
@@ -584,7 +586,11 @@ struct Sidebar::priv
     void jump_to_object(ObjectDataViewModelNode* item);
     void can_search();
 
-    bool sync_extruder_list(bool &only_external_material);
+    bool sync_extruder_list(bool &only_external_material, bool is_manual = false);
+    // Resolve the nozzle option for a multi-nozzle machine. Returns nullopt (and is a no-op) unless
+    // extruder_count >= 2 && support_multi_nozzle. When is_manual, always pops the MultiNozzleSyncDialog;
+    // otherwise reuses the app_config-cached option when the machine's nozzle config is unchanged.
+    std::optional<NozzleOption> get_nozzle_options(MachineObject* obj, int extruder_count, bool support_multi_nozzle, bool is_manual);
     bool switch_diameter(bool single);
     void update_sync_status(const MachineObject* obj);
 
@@ -1323,7 +1329,288 @@ static bool is_skip_high_flow_printer(const std::string& printer)
     return invalidate_list.count(printer);
 };
 
-bool Sidebar::priv::sync_extruder_list(bool &only_external_material)
+// ---- Multi-nozzle sync helpers ----------------------------
+// Serialize/deserialize the machine nozzle config + chosen NozzleOption for the app_config
+// "sync_extruder" reuse cache, and Sidebar::priv::get_nozzle_options (the nozzle picker).
+
+static std::string serialize_nozzle_config(const std::map<int, std::vector<DevNozzle>>& nozzle_cfg_map)
+{
+    std::ostringstream oss;
+
+    std::vector<DevNozzle> deputy_nozzles;
+    auto deputy_it = nozzle_cfg_map.find(1);
+    if (deputy_it != nozzle_cfg_map.end()) {
+        deputy_nozzles = deputy_it->second;
+    }
+
+    std::vector<DevNozzle> main_nozzles;
+    auto main_it = nozzle_cfg_map.find(0);
+    if (main_it != nozzle_cfg_map.end()) {
+        main_nozzles = main_it->second;
+    }
+
+    for (size_t i = 0; i < deputy_nozzles.size(); ++i) {
+        if (i > 0) oss << ";";
+        oss << std::fixed << std::setprecision(1) << deputy_nozzles[i].GetNozzleDiameter() << ","
+            << static_cast<int>(deputy_nozzles[i].GetNozzleFlowType());
+    }
+
+    oss << "|";
+
+    for (size_t i = 0; i < main_nozzles.size(); ++i) {
+        if (i > 0) oss << ";";
+        oss << std::fixed << std::setprecision(1) << main_nozzles[i].GetNozzleDiameter() << ","
+            << static_cast<int>(main_nozzles[i].GetNozzleFlowType());
+    }
+
+    return oss.str();
+}
+
+static std::map<int, std::vector<DevNozzle>> deserialize_nozzle_config(const std::string &config_str)
+{
+    std::map<int, std::vector<DevNozzle>> nozzle_cfg_map;
+    if (config_str.empty()) return nozzle_cfg_map;
+
+    std::vector<std::string> extruder_parts;
+    boost::split(extruder_parts, config_str, boost::is_any_of("|"));
+
+    auto get_nozzles_from_string = [](const std::string& part_str) -> std::vector<DevNozzle> {
+        std::vector<DevNozzle> nozzles;
+        std::vector<std::string> parts;
+        boost::split(parts, part_str, boost::is_any_of(";"));
+        for (const auto &part : parts) {
+            std::vector<std::string> values;
+            boost::split(values, part, boost::is_any_of(","));
+            if (values.size() == 2) {
+                DevNozzle nozzle;
+                nozzle.m_diameter = std::stof(values[0]);
+                nozzle.m_nozzle_flow = static_cast<NozzleFlowType>(std::stoi(values[1]));
+                nozzles.push_back(nozzle);
+            }
+        }
+        return nozzles;
+    };
+
+    if (extruder_parts.size() != 2) {
+        auto nozzles = get_nozzles_from_string(config_str);
+        nozzle_cfg_map[MAIN_EXTRUDER_ID] = nozzles;
+        nozzle_cfg_map[DEPUTY_EXTRUDER_ID] = { DevNozzle() };
+        return nozzle_cfg_map;
+    }
+
+    if (!extruder_parts[0].empty()) {
+        auto nozzles = get_nozzles_from_string(extruder_parts[0]);
+        nozzle_cfg_map[DEPUTY_EXTRUDER_ID] = nozzles;
+    }
+    if (!extruder_parts[1].empty()) {
+        auto nozzles = get_nozzles_from_string(extruder_parts[1]);
+        nozzle_cfg_map[MAIN_EXTRUDER_ID] = nozzles;
+    }
+
+    return nozzle_cfg_map;
+}
+
+static bool is_same_nozzle_config(const std::map<int, std::vector<DevNozzle>> &config1, const std::map<int, std::vector<DevNozzle>> &config2)
+{
+    if (config1.size() != config2.size()) return false;
+
+    for (const auto& [eid, nozzles1] : config1) {
+        auto it = config2.find(eid);
+        if (it == config2.end()) return false;
+
+        const auto &nozzles2 = it->second;
+        if (nozzles1.size() != nozzles2.size()) return false;
+
+        auto sorted_nozzles1 = nozzles1;
+        auto sorted_nozzles2 = nozzles2;
+
+        auto compare_nozzle = [](const DevNozzle &a, const DevNozzle &b) {
+            float dia_a = a.GetNozzleDiameter();
+            float dia_b = b.GetNozzleDiameter();
+            if (std::abs(dia_a - dia_b) > EPSILON) {
+                return dia_a < dia_b;
+            }
+            return static_cast<int>(a.GetNozzleFlowType()) < static_cast<int>(b.GetNozzleFlowType());
+        };
+
+        std::sort(sorted_nozzles1.begin(), sorted_nozzles1.end(), compare_nozzle);
+        std::sort(sorted_nozzles2.begin(), sorted_nozzles2.end(), compare_nozzle);
+
+        for (size_t i = 0; i < sorted_nozzles1.size(); ++i) {
+            if (std::abs(sorted_nozzles1[i].GetNozzleDiameter() - sorted_nozzles2[i].GetNozzleDiameter()) > EPSILON ||
+                sorted_nozzles1[i].GetNozzleFlowType() != sorted_nozzles2[i].GetNozzleFlowType()) {
+                return false;
+            }
+        }
+    }
+
+    return true;
+}
+
+static std::string serialize_nozzle_option(const NozzleOption& option) {
+    std::ostringstream oss;
+    oss << option.diameter << "|";
+
+    bool first = true;
+    for (const auto& pair : option.extruder_nozzle_stats) {
+        if (!first) oss << ";";
+        first = false;
+        oss << pair.first << ":";
+
+        bool first_stat = true;
+        for (const auto& stat_pair : pair.second) {
+            if (!first_stat) oss << ",";
+            first_stat = false;
+            oss << static_cast<int>(stat_pair.first) << "#" << stat_pair.second;
+        }
+    }
+    return oss.str();
+}
+
+static std::optional<NozzleOption> deserialize_nozzle_option(const std::string& option_str) {
+    if (option_str.empty()) return std::nullopt;
+
+    std::vector<std::string> parts;
+    boost::split(parts, option_str, boost::is_any_of("|"));
+    if (parts.size() != 2) return std::nullopt;
+
+    NozzleOption option;
+    option.diameter = parts[0];
+
+    std::vector<std::string> extruder_parts;
+    boost::split(extruder_parts, parts[1], boost::is_any_of(";"));
+
+    for (const auto& extruder_part : extruder_parts) {
+        if (extruder_part.empty()) continue;
+
+        std::vector<std::string> extruder_data;
+        boost::split(extruder_data, extruder_part, boost::is_any_of(":"));
+        if (extruder_data.size() != 2) continue;
+
+        int extruder_id = std::stoi(extruder_data[0]);
+        std::unordered_map<NozzleVolumeType, int> stats;
+
+        std::vector<std::string> stat_parts;
+        boost::split(stat_parts, extruder_data[1], boost::is_any_of(","));
+
+        for (const auto& stat_part : stat_parts) {
+            std::vector<std::string> kv;
+            boost::split(kv, stat_part, boost::is_any_of("#"));
+            if (kv.size() == 2) {
+                NozzleVolumeType type = static_cast<NozzleVolumeType>(std::stoi(kv[0]));
+                int count = std::stoi(kv[1]);
+                stats[type] = count;
+            }
+        }
+
+        option.extruder_nozzle_stats[extruder_id] = stats;
+    }
+
+    return option;
+}
+
+std::optional<NozzleOption> Sidebar::priv::get_nozzle_options(MachineObject* obj, int extruder_count, bool support_multi_nozzle, bool is_manual)
+{
+    if (extruder_count < 2 || !support_multi_nozzle) {
+        return std::nullopt;
+    }
+    if (!obj || !obj->GetNozzleSystem()) return std::nullopt;
+    auto nozzle_system = obj->GetNozzleSystem();
+
+    PresetBundle *preset_bundle = wxGetApp().preset_bundle;
+    if (!preset_bundle) return std::nullopt;
+
+    std::string curr_dev_id = obj->get_dev_id();
+    std::map<int, std::vector<DevNozzle>> curr_nozzle_cfg;
+
+    for (const auto& ext_nozzle : nozzle_system->GetExtNozzles()) {
+        int extruder_id = ext_nozzle.first;
+        curr_nozzle_cfg[extruder_id].emplace_back(ext_nozzle.second);
+    }
+
+    for (const auto& rack_nozzle : nozzle_system->GetRackNozzles()) {
+        curr_nozzle_cfg[MAIN_EXTRUDER_ID].emplace_back(rack_nozzle.second);
+    }
+
+    AppConfig *app_config = wxGetApp().app_config;
+    std::string saved_dev_id = app_config->get("sync_extruder", "dev_id");
+    std::string saved_nozzle_config_str = app_config->get("sync_extruder", "nozzle_config");
+    std::string saved_nozzle_option_str = app_config->get("sync_extruder", "nozzle_option");
+    std::optional<NozzleOption> nozzle_option;
+
+    if (is_manual) {
+        nozzle_option = tryPopUpMultiNozzleDialog(obj);
+    } else {
+        bool can_reuse_saved_option = false;
+        if (!saved_dev_id.empty() && !saved_nozzle_config_str.empty() && !saved_nozzle_option_str.empty() && saved_dev_id == curr_dev_id) {
+            auto saved_nozzle_config = deserialize_nozzle_config(saved_nozzle_config_str);
+            if (is_same_nozzle_config(saved_nozzle_config, curr_nozzle_cfg)) {
+                nozzle_option = deserialize_nozzle_option(saved_nozzle_option_str);
+                can_reuse_saved_option = nozzle_option.has_value();
+            }
+            if (can_reuse_saved_option) {
+                BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << " Reusing saved nozzle option for dev_id: " << curr_dev_id;
+
+                auto                     &project_config         = preset_bundle->project_config;
+                ConfigOptionEnumsGeneric *nozzle_volume_type_opt = project_config.option<ConfigOptionEnumsGeneric>("nozzle_volume_type");
+
+                // Write to preset bundle config
+                for (int extruder_id = 0; extruder_id < extruder_count; ++extruder_id) {
+                    NozzleVolumeType volume_type;
+                    int              nozzle_count;
+                    bool             clear_all = true;
+
+                    if (!nozzle_option->extruder_nozzle_stats.count(extruder_id)) {
+                        nozzle_count = 0;
+                        // Reset the concrete volume types (Standard/High Flow); Hybrid stays a hidden match-any
+                        // sentinel and is left alone. TPU High Flow is a concrete variant shipped on 0.4/0.6
+                        // nozzles, so reset it too, but only there (mirrors the High-Flow-skip-for-0.2 guard).
+                        std::vector<NozzleVolumeType> reset_types{nvtStandard, nvtHighFlow};
+                        if (extruder_supports_tpu_high_flow(preset_bundle, extruder_id))
+                            reset_types.push_back(nvtTPUHighFlow);
+                        for (NozzleVolumeType vt : reset_types) {
+                            volume_type = vt;
+                            setExtruderNozzleCount(preset_bundle, extruder_id, volume_type, nozzle_count, clear_all);
+                            clear_all = false;
+                        }
+                    } else {
+                        for (auto &stat : nozzle_option->extruder_nozzle_stats[extruder_id]) {
+                            volume_type  = stat.first;
+                            nozzle_count = stat.second;
+                            setExtruderNozzleCount(preset_bundle, extruder_id, volume_type, nozzle_count, clear_all);
+                            clear_all = false;
+                        }
+                    }
+                }
+                // Orca: nozzle stats are persisted directly into the preset's `extruder_nozzle_stats` key;
+                // there is no machine/user data-source flag on the stats.
+            }
+        }
+
+        if (!can_reuse_saved_option) {
+            nozzle_option = tryPopUpMultiNozzleDialog(obj);
+        }
+    }
+    if (nozzle_option) {
+        std::string current_nozzle_config = serialize_nozzle_config(curr_nozzle_cfg);
+        std::string current_nozzle_option = serialize_nozzle_option(*nozzle_option);
+        if (app_config->has_section("sync_extruder")) {
+            app_config->set("sync_extruder", "dev_id", curr_dev_id);
+            app_config->set("sync_extruder", "nozzle_config", current_nozzle_config);
+            app_config->set("sync_extruder", "nozzle_option", current_nozzle_option);
+        } else {
+            std::map<std::string, std::string> data;
+            data["dev_id"]        = curr_dev_id;
+            data["nozzle_config"] = current_nozzle_config;
+            data["nozzle_option"] = current_nozzle_option;
+            app_config->set_section("sync_extruder", data);
+        }
+    }
+
+    return nozzle_option;
+}
+
+bool Sidebar::priv::sync_extruder_list(bool &only_external_material, bool is_manual)
 {
     MachineObject *obj = wxGetApp().getDeviceManager()->get_selected_machine();
     auto           printer_name = plater->get_selected_printer_name_in_combox();
@@ -1377,13 +1664,51 @@ bool Sidebar::priv::sync_extruder_list(bool &only_external_material)
     }
     assert(obj->GetExtderSystem()->GetTotalExtderCount() == extruder_nums);
 
+    // Multi-nozzle: resolve the nozzle option (pops MultiNozzleSyncDialog when is_manual). No-op for every
+    // existing printer — support_multi_nozzle is false unless some extruder_max_nozzle_count entry is a real
+    // value > 1 (nil-guarded, matching the manual/ToolOrdering gates), which no shipping single-nozzle or
+    // dual-extruder profile sets. When the machine is multi-nozzle but no option resolves (e.g. user cancelled),
+    // abort the sync.
+    const ConfigOptionIntsNullable *extruder_max_nozzle_count = cur_preset.config.option<ConfigOptionIntsNullable>("extruder_max_nozzle_count");
+    bool support_multi_nozzle = extruder_max_nozzle_count != nullptr &&
+                                std::any_of(extruder_max_nozzle_count->values.begin(), extruder_max_nozzle_count->values.end(),
+                                            [](int val) { return val > 1 && val != ConfigOptionIntsNullable::nil_value(); });
+    auto nozzle_option = get_nozzle_options(obj, extruder_nums, support_multi_nozzle, is_manual);
+    if (!nozzle_option && support_multi_nozzle)
+        return false;
+
     std::vector<float> nozzle_diameters;
     nozzle_diameters.resize(extruder_nums);
+    std::vector<NozzleVolumeType> target_types(extruder_nums, NozzleVolumeType::nvtStandard);
     for (size_t index = 0; index < extruder_nums; ++index) {
         int extruder_id = extruder_map[index];
-        nozzle_diameters[extruder_id] = obj->GetExtderSystem()->GetNozzleDiameter(index);
+        nozzle_diameters[extruder_id] = nozzle_option ? atof(nozzle_option->diameter.c_str()) : obj->GetExtderSystem()->GetNozzleDiameter(index);
         NozzleVolumeType target_type = NozzleVolumeType::nvtStandard;
-        auto printer_tab = dynamic_cast<TabPrinter *>(wxGetApp().get_tab(Preset::TYPE_PRINTER));
+        std::optional<NozzleVolumeType> select_type;
+        if (nozzle_option && nozzle_option->extruder_nozzle_stats.count(index)) {
+            const auto &stats = nozzle_option->extruder_nozzle_stats[index];
+            if (stats.size() > 1) {
+                // Orca: for a mixed extruder, keep Hybrid out of the (still-deferred) nozzle-centric slicing
+                // pipeline, so collapse to the dominant concrete volume type (tie -> Standard).
+                // TPU High Flow is shipped on 0.4/0.6 nozzles, so only fold it in there (mirrors the
+                // High-Flow-skip-for-0.2 guard). Uses the device-reported diameter, same predicate as the preset path.
+                int std_cnt = 0, hf_cnt = 0, tpu_hf_cnt = 0;
+                for (const auto &kv : stats) {
+                    if (kv.first == nvtStandard)         std_cnt    = kv.second;
+                    else if (kv.first == nvtHighFlow)    hf_cnt     = kv.second;
+                    else if (kv.first == nvtTPUHighFlow) tpu_hf_cnt = kv.second;
+                }
+                if (!nozzle_diameter_supports_tpu_high_flow(nozzle_diameters[extruder_id]))
+                    tpu_hf_cnt = 0;
+                select_type = nvtStandard;
+                if (hf_cnt > std_cnt && hf_cnt >= tpu_hf_cnt)
+                    select_type = nvtHighFlow;
+                else if (tpu_hf_cnt > std_cnt && tpu_hf_cnt > hf_cnt)
+                    select_type = nvtTPUHighFlow;
+            } else {
+                select_type = stats.begin()->first;
+            }
+        }
         if (obj->is_nozzle_flow_type_supported()) {
             if (obj->GetExtderSystem()->GetNozzleFlowType(index) == NozzleFlowType::NONE_FLOWTYPE) {
                 MessageDialog dlg(this->plater, _L("There are unset nozzle types. Please set the nozzle types of all extruders before synchronizing."),
@@ -1393,9 +1718,13 @@ bool Sidebar::priv::sync_extruder_list(bool &only_external_material)
             }
             // hack code, only use standard flow for 0.2
             if (std::fabs(nozzle_diameters[extruder_id] - 0.2) > EPSILON)
-                target_type = NozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(extruder_id) - 1);
+                // Map device flow->volume via the table, not `flowtype - 1`.
+                // The arithmetic only aligns for S_FLOW/H_FLOW; U_FLOW(3)-1 would yield nvtHybrid(2), not nvtTPUHighFlow(3).
+                target_type = DevNozzle::ToNozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(extruder_id));
         }
-        printer_tab->set_extruder_volume_type(index, target_type);
+        if (select_type)
+            target_type = *select_type;
+        target_types[index] = target_type;
     }
 
     int deputy_4 = 0, main_4 = 0, deputy_1 = 0, main_1 = 0;
@@ -1439,6 +1768,12 @@ bool Sidebar::priv::sync_extruder_list(bool &only_external_material)
         is_switching_diameter = false;
     }
 
+    // set nozzle volume type after switching prset, so this value can override the old value stored in conf
+    auto printer_tab = dynamic_cast<TabPrinter *>(wxGetApp().get_tab(Preset::TYPE_PRINTER));
+    for (size_t idx = 0; idx < target_types.size(); ++idx) {
+        printer_tab->set_extruder_volume_type(idx, target_types[idx]);
+    }
+
     BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << __LINE__ << " finish sync_extruder_list";
     return true;
 }
@@ -3745,15 +4080,13 @@ void Sidebar::sync_ams_list(bool is_from_big_sync_btn)
     { // badge ams filament
         clear_combos_filament_badge();
         if (sync_result.direct_sync) {
-            auto& ams_list = wxGetApp().preset_bundle->filament_ams_list;
-            size_t tray_idx = 0;
-            for (auto& entry : ams_list) {
-                if (tray_idx >= p->combos_filament.size()) break;
-                auto filament_id = entry.second.opt_string("filament_id", 0u);
-                if (!filament_id.empty()) {
-                    badge_combox_filament(p->combos_filament[tray_idx]);
-                }
-                tray_idx++;
+            // Orca: PresetBundle::sync_ams_list rebuilds combos_filament
+            // 1:1 from the AMS trays that produce a combo (loaded trays + placeholders; non-placeholder
+            // empty trays are skipped), so every resulting combo is AMS-sourced and gets a badge. The
+            // previous per-tray index walked the full filament_ams_list (including the skipped empties),
+            // so an empty slot before a loaded one dropped the badge for the trailing filaments.
+            for (auto &c : p->combos_filament) {
+                badge_combox_filament(c);
             }
         }
     }
@@ -3948,7 +4281,8 @@ bool Sidebar::is_multifilament()
 void Sidebar::deal_btn_sync() {
     m_begin_sync_printer_status = true;
     bool only_external_material;
-    auto ok = p->sync_extruder_list(only_external_material);
+    // Manual "sync machine" button: is_manual=true so an H2C pops the MultiNozzleSyncDialog to pick a nozzle option.
+    auto ok = p->sync_extruder_list(only_external_material, true);
     if (ok) {
         pop_sync_nozzle_and_ams_dialog();
     }
@@ -5641,6 +5975,9 @@ std::map<std::string, std::string> Plater::get_bed_texture_maps()
         if (pm->bottom_texture_rect.size() > 0) {
             maps["bottom_texture_rect"] = pm->bottom_texture_rect;
         }
+        if (pm->bottom_texture_rect_longer.size() > 0) {
+            maps["bottom_texture_rect_longer"] = pm->bottom_texture_rect_longer;
+        }
         if (pm->middle_texture_rect.size() > 0) {
             maps["middle_texture_rect"] = pm->middle_texture_rect;
         }
@@ -11112,8 +11449,9 @@ bool Plater::priv::check_ams_status_impl(bool is_slice_all)
         auto nozzle_volumes_values = preset_bundle->project_config.option<ConfigOptionEnumsGeneric>("nozzle_volume_type")->values;
         assert(obj->GetExtderSystem()->GetTotalExtderCount() == 2 && nozzle_volumes_values.size() == 2);
         if (obj->GetExtderSystem()->GetTotalExtderCount() == 2 && nozzle_volumes_values.size() == 2) {
-            NozzleVolumeType right_nozzle_type = NozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(0) - 1);
-            NozzleVolumeType left_nozzle_type = NozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(1) - 1);
+            // Map device flow->volume via the table, not `flowtype - 1` (which mis-maps U_FLOW to nvtHybrid).
+            NozzleVolumeType right_nozzle_type = DevNozzle::ToNozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(0));
+            NozzleVolumeType left_nozzle_type = DevNozzle::ToNozzleVolumeType(obj->GetExtderSystem()->GetNozzleFlowType(1));
             NozzleVolumeType preset_left_type  = NozzleVolumeType(nozzle_volumes_values[0]);
             NozzleVolumeType preset_right_type  = NozzleVolumeType(nozzle_volumes_values[1]);
             is_same_as_printer = (left_nozzle_type == preset_left_type && right_nozzle_type == preset_right_type);
@@ -17317,6 +17655,9 @@ void Plater::suppress_background_process(const bool stop_background_process)
     this->p->suppressed_backround_processing_update = true;
 }
 
+// Expose the slicing process to the device GUI.
+BackgroundSlicingProcess& Plater::background_process() { return p->background_process; }
+
 void Plater::center_selection()             { p->center_selection(); }
 void Plater::drop_selection()               { p->drop_selection(); }
 void Plater::mirror(Axis axis)              { p->mirror(axis); }
diff --git a/src/slic3r/GUI/Plater.hpp b/src/slic3r/GUI/Plater.hpp
index c70c5ca7c1..626d288f46 100644
--- a/src/slic3r/GUI/Plater.hpp
+++ b/src/slic3r/GUI/Plater.hpp
@@ -50,6 +50,7 @@ class SLAPrint;
 //BBS: add partplatelist and SlicingStatusEvent
 class PartPlateList;
 class SlicingStatusEvent;
+class BackgroundSlicingProcess;
 enum SLAPrintObjectStep : unsigned int;
 enum class ConversionType : int;
 class DevAms;
@@ -519,6 +520,9 @@ public:
     void schedule_background_process(bool schedule = true);
     bool is_background_process_update_scheduled() const;
     void suppress_background_process(const bool stop_background_process) ;
+    // Expose the slicing process so the device GUI can read the current
+    // GCodeProcessorResult (e.g. the nozzle grouping for print-dispatch mapping).
+    BackgroundSlicingProcess& background_process();
     /* -1: send current gcode if not specified
      * -2: send all gcode to target machine */
     int send_gcode(int plate_idx = -1, Export3mfProgressFn proFn = nullptr);
diff --git a/src/slic3r/GUI/PrePrintChecker.cpp b/src/slic3r/GUI/PrePrintChecker.cpp
index d66ee53d56..870d3f835d 100644
--- a/src/slic3r/GUI/PrePrintChecker.cpp
+++ b/src/slic3r/GUI/PrePrintChecker.cpp
@@ -36,6 +36,8 @@ std::string PrePrintChecker::get_print_status_info(PrintDialogStatus status)
     case PrintStatusNotSupportedPrintAll: return "PrintStatusNotSupportedPrintAll";
     case PrintStatusBlankPlate: return "PrintStatusBlankPlate";
     case PrintStatusUnsupportedPrinter: return "PrintStatusUnsupportedPrinter";
+    case PrintStatusRackNozzleMappingWaiting: return "PrintStatusRackNozzleMappingWaiting";
+    case PrintStatusRackNozzleMappingError: return "PrintStatusRackNozzleMappingError";
     case PrintStatusColorQuantityExceed: return "PrintStatusColorQuantityExceed";
     // Handle filament errors
     case PrintStatusAmsOnSettingup: return "PrintStatusAmsOnSettingup";
@@ -47,6 +49,7 @@ std::string PrePrintChecker::get_print_status_info(PrintDialogStatus status)
     case PrintStatusTimelapseNoSdcard: return "PrintStatusTimelapseNoSdcard";
     case PrintStatusTimelapseWarning: return "PrintStatusTimelapseWarning";
     case PrintStatusMixAmsAndVtSlotWarning: return "PrintStatusMixAmsAndVtSlotWarning";
+    case PrintStatusRackNozzleMappingWarning: return "PrintStatusRackNozzleMappingWarning";
     case PrintStatusWarningKvalueNotUsed: return "PrintStatusWarningKvalueNotUsed";
     case PrintStatusHasFilamentInBlackListWarning: return "PrintStatusHasFilamentInBlackListWarning";
     case PrintStatusFilamentWarningHighChamberTemp: return "PrintStatusFilamentWarningHighChamberTemp";
diff --git a/src/slic3r/GUI/PrePrintChecker.hpp b/src/slic3r/GUI/PrePrintChecker.hpp
index 8e4d4ed3f4..53ab441df4 100644
--- a/src/slic3r/GUI/PrePrintChecker.hpp
+++ b/src/slic3r/GUI/PrePrintChecker.hpp
@@ -65,6 +65,8 @@ enum PrintDialogStatus : unsigned int {
     PrintStatusNotSupportedPrintAll,
     PrintStatusBlankPlate,
     PrintStatusUnsupportedPrinter,
+    PrintStatusRackNozzleMappingWaiting,
+    PrintStatusRackNozzleMappingError,
     PrintStatusPrinterErrorEnd,
 
     // Errors for filament, Block Print
@@ -89,6 +91,7 @@ enum PrintDialogStatus : unsigned int {
     PrintStatusTimelapseWarning,
     PrintStatusMixAmsAndVtSlotWarning,
     PrintStatusToolHeadCoolingFanWarning,
+    PrintStatusRackNozzleMappingWarning,
     PrintStatusPrinterWarningEnd,
 
     // Warnings for filament
diff --git a/src/slic3r/GUI/PresetComboBoxes.cpp b/src/slic3r/GUI/PresetComboBoxes.cpp
index 6475ae1c88..c52d0eed3a 100644
--- a/src/slic3r/GUI/PresetComboBoxes.cpp
+++ b/src/slic3r/GUI/PresetComboBoxes.cpp
@@ -1307,7 +1307,16 @@ void PlaterPresetComboBox::update()
     bool selected_in_ams = false;
     if (m_type == Preset::TYPE_FILAMENT) {
         set_replace_text("Bambu", "BambuStudioBlack");
-        selected_in_ams = add_ams_filaments(into_u8(selected_user_preset.empty() ? selected_system_preset : selected_user_preset), true);
+        // Orca: selected_system/user_preset hold the FULL preset name because Orca keys the maps above by
+        // full name to avoid alias collisions (BBS keys by alias). add_ams_filaments() compares against
+        // get_preset_name() which returns the alias, so resolve the selection back to its alias here.
+        // Without this, e.g. "Bambu PLA Basic @BBL H2C" never equals the AMS tray alias "Bambu PLA Basic",
+        // so the FROM_AMS flag is never set and update_sync_status() wipes the AMS sync check mark on the
+        // filament cards for connected Bambu printers.
+        wxString selected_full = selected_user_preset.empty() ? selected_system_preset : selected_user_preset;
+        auto     alias_it      = preset_aliases.find(selected_full);
+        wxString selected_alias = alias_it != preset_aliases.end() ? from_u8(alias_it->second) : selected_full;
+        selected_in_ams = add_ams_filaments(into_u8(selected_alias), true);
     }
 
     std::vector<std::string> filament_orders = {"Bambu PLA Basic", "Bambu PLA Matte", "Bambu PETG HF",    "Bambu ABS",      "Bambu PLA Silk", "Bambu PLA-CF",
diff --git a/src/slic3r/GUI/PrintOptionsDialog.cpp b/src/slic3r/GUI/PrintOptionsDialog.cpp
index 562b4cbc24..39f115ed89 100644
--- a/src/slic3r/GUI/PrintOptionsDialog.cpp
+++ b/src/slic3r/GUI/PrintOptionsDialog.cpp
@@ -1426,6 +1426,7 @@ wxString PrinterPartsDialog::GetString(NozzleFlowType nozzle_flow_type) const {
     switch (nozzle_flow_type) {
         case Slic3r::S_FLOW: return _L("Standard");
         case Slic3r::H_FLOW: return _L("High flow");
+        case Slic3r::U_FLOW: return _L("TPU High flow");
         default: break;
     }
 
diff --git a/src/slic3r/GUI/SelectMachine.cpp b/src/slic3r/GUI/SelectMachine.cpp
index 9fd0a65087..e66d07d2e9 100644
--- a/src/slic3r/GUI/SelectMachine.cpp
+++ b/src/slic3r/GUI/SelectMachine.cpp
@@ -20,12 +20,16 @@
 
 #include "DeviceCore/DevConfig.h"
 #include "DeviceCore/DevNozzleSystem.h"
+#include "DeviceCore/DevNozzleRack.h"
 #include "DeviceCore/DevExtensionTool.h"
 #include "DeviceCore/DevExtruderSystem.h"
 #include "DeviceCore/DevFilaBlackList.h"
 #include "DeviceCore/DevFilaSystem.h"
+#include "DeviceCore/DevFilaSwitch.h"
 #include "DeviceCore/DevManager.h"
 #include "DeviceCore/DevMapping.h"
+#include "DeviceCore/DevUtilBackend.h"
+#include "DeviceCore/DevMappingNozzle.h"
 #include "DeviceCore/DevStorage.h"
 
 #include <wx/progdlg.h>
@@ -62,12 +66,22 @@ std::string get_nozzle_volume_type_cloud_string(NozzleVolumeType nozzle_volume_t
     else if (nozzle_volume_type == NozzleVolumeType::nvtHighFlow) {
         return "high_flow";
     }
+    else if (nozzle_volume_type == NozzleVolumeType::nvtTPUHighFlow) {
+        return "tpu_high_flow";
+    }
+    else if (nozzle_volume_type == NozzleVolumeType::nvtHybrid) {
+        // to be supported
+        return "hybrid_flow";
+    }
     else {
         assert(false);
         return "";
     }
 }
 
+// Throttle so the rack print-dispatch nozzle-mapping request isn't re-sent on every status poll.
+static int s_nozzle_mapping_last_request_time = 0;
+
 std::vector<wxString> SelectMachineDialog::MACHINE_BED_TYPE_STRING;
 std::vector<string> SelectMachineDialog::MachineBedTypeString;
 void                SelectMachineDialog::init_machine_bed_types()
@@ -558,7 +572,11 @@ SelectMachineDialog::SelectMachineDialog(Plater *plater)
     m_checkbox_list["flow_cali"]     = option_flow_dynamics_cali;
     m_checkbox_list["nozzle_offset_cali"] = option_nozzle_offset_cali_cali;
     for (auto print_opt : m_checkbox_list_order) {
-        print_opt->Bind(EVT_SWITCH_PRINT_OPTION, [this](auto &e) { save_option_vals(); });
+        print_opt->Bind(EVT_SWITCH_PRINT_OPTION, [this, print_opt](auto &e) {
+            save_option_vals();
+            // Flow calibration feeds the printer-side rack nozzle mapping; re-request it on change.
+            if (print_opt == m_checkbox_list["flow_cali"]) on_flow_cali_option_changed();
+        });
     }
 
     option_auto_bed_level->Hide();
@@ -932,13 +950,30 @@ void SelectMachineDialog::finish_mode()
 
 void SelectMachineDialog::sync_ams_mapping_result(std::vector<FilamentInfo> &result)
 {
+    // A rack / filament-switcher printer grows its filament cards to show the mapped-nozzle row.
+    // Reflow the grid so the taller cards aren't clipped; no-op for printers that never show it.
+    auto relayout_nozzle_cards = [this]() {
+        DeviceManager* dev = wxGetApp().getDeviceManager();
+        MachineObject* obj_ = dev ? dev->get_selected_machine() : nullptr;
+        if (!obj_) return;
+        DevNozzleSystem* ns = obj_->GetNozzleSystem();
+        if (!obj_->GetFilaSwitch()->IsInstalled() && !(ns && ns->GetNozzleRack()->IsSupported())) return;
+        if (m_sizer_ams_mapping_left)  { m_sizer_ams_mapping_left->Layout();  m_filament_panel_left_sizer->Layout();  m_filament_left_panel->Layout();  }
+        if (m_sizer_ams_mapping_right) { m_sizer_ams_mapping_right->Layout(); m_filament_panel_right_sizer->Layout(); m_filament_right_panel->Layout(); }
+        if (m_sizer_ams_mapping)       { m_sizer_ams_mapping->Layout();       m_filament_panel_sizer->Layout();       m_filament_panel->Layout();       }
+        if (m_scroll_area) { m_scroll_area->Layout(); }
+        Layout();
+    };
+
     if (result.empty()) {
         BOOST_LOG_TRIVIAL(info) << "ams_mapping result is empty";
         for (auto it = m_materialList.begin(); it != m_materialList.end(); it++) {
             wxString ams_id = "Ext";//
             wxColour ams_col = wxColour(0xCE, 0xCE, 0xCE);
             it->second->item->set_ams_info(ams_col, ams_id);
+            it->second->item->set_nozzle_info(get_mapped_nozzle_str(it->first));
         }
+        relayout_nozzle_cards();
         return;
     }
 
@@ -975,11 +1010,13 @@ void SelectMachineDialog::sync_ams_mapping_result(std::vector<FilamentInfo> &res
                     cols.push_back(DevAmsTray::decode_color(col));
                 }
                 m->set_ams_info(ams_col, ams_id,f->ctype, cols);
+                m->set_nozzle_info(get_mapped_nozzle_str(id));
                 break;
             }
             iter++;
         }
     }
+    relayout_nozzle_cards();
     auto tab_index = (MainFrame::TabPosition) dynamic_cast<Notebook *>(wxGetApp().tab_panel())->GetSelection();
     if (tab_index == MainFrame::TabPosition::tp3DEditor || tab_index == MainFrame::TabPosition::tpPreview) {
         updata_thumbnail_data_after_connected_printer();
@@ -1378,6 +1415,7 @@ bool SelectMachineDialog::is_nozzle_type_match(DevExtderSystem data, wxString& e
         if (nozzle_volume_type_opt) {
             NozzleVolumeType nozzle_volume_type = (NozzleVolumeType) (nozzle_volume_type_opt->get_at(used_extruders[i]));
             if (nozzle_volume_type == NozzleVolumeType::nvtStandard) { used_extruders_flow[used_extruders[i]] = "Standard";}
+            else if (nozzle_volume_type == NozzleVolumeType::nvtTPUHighFlow) { used_extruders_flow[used_extruders[i]] = "TPU High Flow";}
             else {used_extruders_flow[used_extruders[i]] = "High Flow";}
         }
     }
@@ -1397,6 +1435,10 @@ bool SelectMachineDialog::is_nozzle_type_match(DevExtderSystem data, wxString& e
         {
             flow_type_of_machine.push_back(L("Standard"));
         }
+        else if (it.GetNozzleFlowType() == NozzleFlowType::U_FLOW)
+        {
+            flow_type_of_machine.push_back(L("TPU High Flow"));
+        }
     }
 
     //Only when all preset nozzle types and machine nozzle types are exactly the same, return true.
@@ -1443,6 +1485,279 @@ int SelectMachineDialog::convert_filament_map_nozzle_id_to_task_nozzle_id(int no
     }
 }
 
+// Physical nozzle(s) a mapped filament prints on. key: nozzle pos id, value: nozzle.
+// (fila_id is the filament index, i.e. FilamentInfo::id.) Non-rack printers resolve from the
+// filament->extruder map; a rack printer (H2C) resolves from the print-dispatch mapping the printer
+// returned. Empty when no mapping is available yet — the per-nozzle blacklist check then skips it.
+std::map<int, DevNozzle> SelectMachineDialog::get_mapped_nozzles(int fila_id) const
+{
+    std::map<int, DevNozzle> nozzle_map;
+
+    DeviceManager* dev = wxGetApp().getDeviceManager();
+    if (!dev) { return nozzle_map; }
+    MachineObject* obj_ = dev->get_selected_machine();
+    if (!obj_) { return nozzle_map; }
+
+    int total_ext_count = 0;
+    if (m_print_type == FROM_NORMAL) {
+        const auto& full_config = wxGetApp().preset_bundle->full_config();
+        const auto  opt         = full_config.option<ConfigOptionFloats>("nozzle_diameter");
+        total_ext_count         = opt ? opt->values.size() : 0;
+    } else {
+        const auto opt  = m_required_data_config.option<ConfigOptionFloats>("nozzle_diameter");
+        total_ext_count = opt ? opt->values.size() : 0;
+    }
+
+    if (total_ext_count != obj_->GetExtderSystem()->GetTotalExtderCount()) {
+        BOOST_LOG_TRIVIAL(error) << __FUNCTION__ << ": total_ext_count not match";
+        return nozzle_map;
+    }
+
+    DevNozzleSystem* nozzle_system = obj_->GetNozzleSystem();
+    if (!nozzle_system) { return nozzle_map; }
+
+    if (!nozzle_system->GetNozzleRack()->IsSupported()) {
+        if (total_ext_count == 1) {
+            nozzle_map[MAIN_EXTRUDER_ID] = nozzle_system->GetNozzleByPosId(MAIN_EXTRUDER_ID);
+        } else if (total_ext_count == 2) {
+            if (fila_id >= 0 && (size_t)fila_id < m_filaments_map.size()) {
+                if (m_filaments_map[fila_id] == 1) {
+                    nozzle_map[DEPUTY_EXTRUDER_ID] = nozzle_system->GetNozzleByPosId(DEPUTY_EXTRUDER_ID);
+                } else if (m_filaments_map[fila_id] == 2) {
+                    nozzle_map[MAIN_EXTRUDER_ID] = nozzle_system->GetNozzleByPosId(MAIN_EXTRUDER_ID);
+                }
+            }
+        }
+    } else if (m_print_type == FROM_NORMAL) {
+        // Rack printer (H2C): resolve the physical rack nozzle(s) the print-dispatch mapping assigned
+        // to this filament. Empty until the printer returns the auto-mapping result.
+        for (int nozzle_pos : obj_->get_nozzle_mapping_result()->GetMappedNozzlePosVecByFilaId(fila_id))
+            nozzle_map[nozzle_pos] = nozzle_system->GetNozzleByPosId(nozzle_pos);
+    }
+
+    return nozzle_map;
+}
+
+wxString SelectMachineDialog::get_mapped_nozzle_str(int fila_id) const
+{
+    if (m_print_type != FROM_NORMAL)
+        return wxEmptyString; // no slicing data when printing from sdcard
+
+    DeviceManager* dev = wxGetApp().getDeviceManager();
+    if (!dev) { return wxEmptyString; }
+    MachineObject* obj_ = dev->get_selected_machine();
+    if (!obj_) { return wxEmptyString; }
+
+    DevNozzleSystem* nozzle_system = obj_->GetNozzleSystem();
+    const bool rack_supported        = nozzle_system && nozzle_system->GetNozzleRack()->IsSupported();
+    const bool fila_switch_installed = obj_->GetFilaSwitch()->IsInstalled();
+
+    // A dynamic nozzle map routes filaments through the filament switcher; without one it can't map.
+    if (use_dynamic_nozzle_map() && !fila_switch_installed)
+        return "?";
+
+    if (fila_switch_installed || rack_supported) {
+        if (rack_supported) {
+            return obj_->get_nozzle_mapping_result()->GetMappedNozzlePosStrByFilaId(fila_id);
+        } else {
+            const auto& nozzle_map = get_mapped_nozzles(fila_id);
+            if (nozzle_map.count(MAIN_EXTRUDER_ID) != 0 && nozzle_map.count(DEPUTY_EXTRUDER_ID) != 0)
+                return "L R";
+            else if (nozzle_map.count(MAIN_EXTRUDER_ID) != 0)
+                return "R";
+            else if (nozzle_map.count(DEPUTY_EXTRUDER_ID) != 0)
+                return "L";
+        }
+        return "?";
+    }
+
+    return wxEmptyString;
+}
+
+bool SelectMachineDialog::use_dynamic_nozzle_map() const
+{
+    if (m_print_type == FROM_NORMAL) {
+        auto nozzle_group_res = DevUtilBackend::GetNozzleGroupResult(m_plater);
+        if (nozzle_group_res && nozzle_group_res->is_support_dynamic_nozzle_map())
+            return true;
+    } else if (m_print_type == FROM_SDCARD_VIEW) {
+        if (m_required_data_plate_data_list.size() > (size_t) m_print_plate_idx) {
+            auto dynamic_nozzle_map = m_required_data_plate_data_list[m_print_plate_idx]->config.option<ConfigOptionBool>("enable_filament_dynamic_map");
+            if (dynamic_nozzle_map)
+                return dynamic_nozzle_map->value;
+        }
+        auto dynamic_nozzle_map = m_required_data_config.option<ConfigOptionBool>("enable_filament_dynamic_map");
+        if (dynamic_nozzle_map)
+            return dynamic_nozzle_map->value;
+    }
+    return false;
+}
+
+void SelectMachineDialog::clear_nozzle_mapping()
+{
+    m_nozzle_mapping_result.clear();
+    // Orca: no BBS get_current_machine(); use the selected device (same accessor get_mapped_nozzles uses).
+    DeviceManager* dev = wxGetApp().getDeviceManager();
+    if (MachineObject* obj_ = dev ? dev->get_selected_machine() : nullptr)
+        obj_->get_nozzle_mapping_result()->Clear();
+}
+
+void SelectMachineDialog::on_flow_cali_option_changed()
+{
+    // Flow calibration feeds the printer-side rack nozzle-mapping computation, so a change must
+    // invalidate the cached mapping and let the next status poll re-request it (V0 path).
+    DeviceManager* dev  = wxGetApp().getDeviceManager();
+    MachineObject* obj_ = dev ? dev->get_selected_machine() : nullptr;
+    if (!obj_ || !(obj_->GetNozzleSystem() && obj_->GetNozzleSystem()->GetNozzleRack()->IsSupported())) return;
+    if (use_dynamic_nozzle_map()) return;
+    // Orca: BBS also pops a confirmation dialog and re-fires immediately (and handles a PA-value
+    // switch Orca lacks); here we just clear + unthrottle so the next poll re-requests promptly.
+    clear_nozzle_mapping();
+    s_nozzle_mapping_last_request_time = 0;
+}
+
+// Rack print-dispatch nozzle mapping, dynamic-map (V1) path. Fires get_auto_nozzle_mapping when no
+// result is cached, blocks Send while the printer computes, then surfaces error/warning. Returns
+// false (pre-print check fails / keep waiting) only while blocking; true when the chain may proceed.
+bool SelectMachineDialog::CheckErrorSyncNozzleMappingResultV1(MachineObject* obj_)
+{
+    if (m_print_type != FROM_NORMAL)
+        return true; // there is no slicing data when printing from sdcard
+
+    if (!obj_)
+        return true;
+
+    if (!(obj_->GetNozzleSystem() && obj_->GetNozzleSystem()->GetNozzleRack()->IsSupported()))
+        return true; // no need to check if the printer has no nozzle rack
+
+    if (!use_dynamic_nozzle_map())
+        return true;
+
+    const auto& obj_nozzle_mapping_ptr = obj_->get_nozzle_mapping_result();
+    if (!obj_nozzle_mapping_ptr->HasResult()) {
+        if (time(nullptr) - s_nozzle_mapping_last_request_time > 10) { // avoid too many requests
+            int rtn = obj_nozzle_mapping_ptr->CtrlGetAutoNozzleMappingV1(m_plater);
+            if (rtn == 0) {
+                s_nozzle_mapping_last_request_time = time(nullptr);
+            } else {
+                const auto& err_msg = wxString::Format(_L("Failed to send nozzle auto-mapping request to printer { code: %d }. "
+                                                          "Please try to refresh the printer information. "
+                                                          "If it still does not recover, you can try to rebind the printer and check the network connection."), rtn);
+                show_status(PrintDialogStatus::PrintStatusRackNozzleMappingWaiting, {err_msg});
+                return false;
+            }
+        }
+
+        show_status(PrintDialogStatus::PrintStatusRackNozzleMappingWaiting, {_L("The printer is calculating nozzle mapping.") + " " + _L("Please wait a moment...")});
+        return false;
+    }
+
+    if (obj_nozzle_mapping_ptr->GetResultStr() == "failed") {
+        const auto& err_msg = wxString::Format(_L("Failed to receive nozzle auto-mapping table from printer { msg: %s }. Please refresh the printer information."), obj_nozzle_mapping_ptr->GetMqttReason());
+        show_status(PrintDialogStatus::PrintStatusRackNozzleMappingError, {err_msg});
+        return false;
+    }
+
+    if (obj_nozzle_mapping_ptr->GetResultStr() == "fail") {
+        const wxString& err_msg = wxString::Format(_L("The printer failed to build the nozzle auto-mapping table { code: %d }. Please refresh nozzle information."), obj_nozzle_mapping_ptr->GetErrno());
+        show_status(PrintDialogStatus::PrintStatusRackNozzleMappingError, {err_msg});
+        return false;
+    }
+
+    const auto& mapping_map = obj_->get_nozzle_mapping_result()->GetNozzleMappingMap();
+    if (!mapping_map.empty()) {
+        if (m_nozzle_mapping_result != mapping_map) {
+            m_nozzle_mapping_result = mapping_map;
+            sync_ams_mapping_result(m_ams_mapping_result);
+        }
+
+        float flush_waste_base    = obj_->get_nozzle_mapping_result()->GetFlushWeightBase();
+        float flush_waste_current = obj_->get_nozzle_mapping_result()->GetFlushWeightCurrent();
+        if ((flush_waste_base != -1) && (flush_waste_current != -1) && flush_waste_current > flush_waste_base) {
+            const wxString& warning_msg = wxString::Format(_L("The current nozzle mapping may produce an extra %0.2f g of waste."), flush_waste_current - flush_waste_base);
+            show_status(PrintDialogStatus::PrintStatusRackNozzleMappingWarning, {warning_msg});
+        }
+        return true;
+    }
+
+    const wxString& err_msg = wxString::Format(_L("Failed to receive nozzle auto-mapping table from printer { msg: %s }. Please refresh the printer information."), "empty table");
+    show_status(PrintDialogStatus::PrintStatusRackNozzleMappingError, {err_msg});
+    return true;
+}
+
+// Rack print-dispatch nozzle mapping, static-rack (V0) path — see CheckErrorSyncNozzleMappingResultV1.
+bool SelectMachineDialog::CheckErrorSyncNozzleMappingResultV0(MachineObject* obj_)
+{
+    if (!obj_)
+        return true;
+
+    if (!(obj_->GetNozzleSystem() && obj_->GetNozzleSystem()->GetNozzleRack()->IsSupported()))
+        return true; // no need to check if the printer has no nozzle rack
+
+    if (m_print_type != FROM_NORMAL)
+        return true; // there is no slicing data when printing from sdcard
+
+    if (use_dynamic_nozzle_map())
+        return true; // handled by the V1 path
+
+    auto nozzle_group_res = DevUtilBackend::GetNozzleGroupResult(m_plater);
+    if (nozzle_group_res && nozzle_group_res->get_used_nozzles_in_extruder(LOGIC_R_EXTRUDER_ID).empty())
+        return true; // no right-extruder nozzles used in slicing -> nothing to map
+
+    const auto& obj_nozzle_mapping_ptr = obj_->get_nozzle_mapping_result();
+    if (!obj_nozzle_mapping_ptr->HasResult()) {
+        if (time(nullptr) - s_nozzle_mapping_last_request_time > 10) { // avoid too many requests
+            // Orca: BBS passes m_pa_value_switch->GetValue() ? 0 : 1; Orca has no PA-value switch UI,
+            // so use the switch-off default (1).
+            int rtn = obj_nozzle_mapping_ptr->CtrlGetAutoNozzleMappingV0(m_plater, m_ams_mapping_result, m_checkbox_list["flow_cali"]->getValueInt(), 1);
+            if (rtn == 0) {
+                s_nozzle_mapping_last_request_time = time(nullptr);
+            } else {
+                const auto& err_msg = wxString::Format(_L("Failed to send nozzle auto-mapping request to printer { code: %d }. "
+                                                          "Please try to refresh the printer information. "
+                                                          "If it still does not recover, you can try to rebind the printer and check the network connection."), rtn);
+                show_status(PrintDialogStatus::PrintStatusRackNozzleMappingWaiting, {err_msg});
+                return false;
+            }
+        }
+
+        show_status(PrintDialogStatus::PrintStatusRackNozzleMappingWaiting, {_L("The printer is calculating nozzle mapping.") + " " + _L("Please wait a moment...")});
+        return false;
+    }
+
+    if (obj_nozzle_mapping_ptr->GetResultStr() == "failed") {
+        const auto& err_msg = wxString::Format(_L("Failed to receive nozzle auto-mapping table from printer { msg: %s }. Please refresh the printer information."), obj_nozzle_mapping_ptr->GetMqttReason());
+        show_status(PrintDialogStatus::PrintStatusRackNozzleMappingError, {err_msg});
+        return false;
+    }
+
+    if (obj_nozzle_mapping_ptr->GetResultStr() == "fail") {
+        const wxString& err_msg = wxString::Format(_L("The printer failed to build the nozzle auto-mapping table { code: %d }. Please refresh nozzle information."), obj_nozzle_mapping_ptr->GetErrno());
+        show_status(PrintDialogStatus::PrintStatusRackNozzleMappingError, {err_msg});
+        return false;
+    }
+
+    const auto& mapping_map = obj_->get_nozzle_mapping_result()->GetNozzleMappingMap();
+    if (!mapping_map.empty()) {
+        if (m_nozzle_mapping_result != mapping_map) {
+            m_nozzle_mapping_result = mapping_map;
+            sync_ams_mapping_result(m_ams_mapping_result);
+        }
+
+        float flush_waste_base    = obj_->get_nozzle_mapping_result()->GetFlushWeightBase();
+        float flush_waste_current = obj_->get_nozzle_mapping_result()->GetFlushWeightCurrent();
+        if ((flush_waste_base != -1) && (flush_waste_current != -1) && flush_waste_current > flush_waste_base) {
+            const wxString& warning_msg = wxString::Format(_L("The current nozzle mapping may produce an extra %0.2f g of waste."), flush_waste_current - flush_waste_base);
+            show_status(PrintDialogStatus::PrintStatusRackNozzleMappingWarning, {warning_msg});
+        }
+        return true;
+    }
+
+    const wxString& err_msg = wxString::Format(_L("Failed to receive nozzle auto-mapping table from printer { msg: %s }. Please refresh the printer information."), "empty table");
+    show_status(PrintDialogStatus::PrintStatusRackNozzleMappingError, {err_msg});
+    return true;
+}
+
 void SelectMachineDialog::prepare(int print_plate_idx)
 {
     m_print_plate_idx = print_plate_idx;
@@ -1684,6 +1999,17 @@ void SelectMachineDialog::show_status(PrintDialogStatus status, std::vector<wxSt
     } else if (status == PrintStatusWarningExtFilamentNotMatch) {
         Enable_Refresh_Button(true);
         Enable_Send_Button(true);
+    } else if (status == PrintDialogStatus::PrintStatusRackNozzleMappingWaiting) {
+        // Printer is computing the rack nozzle mapping: block Send until it replies.
+        Enable_Refresh_Button(true);
+        Enable_Send_Button(false);
+    } else if (status == PrintDialogStatus::PrintStatusRackNozzleMappingError) {
+        Enable_Refresh_Button(true);
+        Enable_Send_Button(false);
+    } else if (status == PrintDialogStatus::PrintStatusRackNozzleMappingWarning) {
+        // Extra-waste warning: allow Send.
+        Enable_Refresh_Button(true);
+        Enable_Send_Button(true);
     }
 
     /*enter perpare mode*/
@@ -1983,15 +2309,48 @@ void SelectMachineDialog::on_ok_btn(wxCommandEvent &event)
             }
         }
 
-        bool in_blacklist = false;
-        std::string action;
-        wxString info;
-        wxString wiki_url;
-        DevFilaBlacklist::check_filaments_in_blacklist_url(obj_->printer_type, filament_brand, filament_type, m_ams_mapping_result[i].filament_id, ams_id, slot_id, "", in_blacklist,
-                                                        action, info, wiki_url);
-        if (in_blacklist && action == "warning") {
-            confirm_text.push_back(ConfirmBeforeSendInfo(info, wiki_url));
-            has_slice_warnings = true;
+        DevFilaBlacklist::CheckFilamentInfo check_info;
+        check_info.dev_id      = obj_->get_dev_id();
+        check_info.model_id    = obj_->printer_type;
+        check_info.fila_id     = m_ams_mapping_result[i].filament_id;
+        check_info.fila_type   = filament_type;
+        check_info.fila_vendor = filament_brand;
+        // Populate fila_name so the high-flow warning strings (blacklist rules 14/15/18/19,
+        // "%s has a risk of nozzle clogging ...") render with the filament name instead of a
+        // leading blank. Resolves the same preset the engine's internal AMS-name recovery uses, so
+        // blacklist name-matching is unchanged.
+        if (auto option = wxGetApp().preset_bundle->get_filament_by_filament_id(check_info.fila_id))
+            check_info.fila_name = option->filament_name;
+        check_info.ams_id      = ams_id;
+        check_info.slot_id     = slot_id;
+        check_info.has_filament_switch = obj_->GetFilaSwitch()->IsInstalled();
+
+        std::vector<DevNozzle> mapped_nozzles;
+        for (const auto &[pos_id, nozzle] : get_mapped_nozzles(m_ams_mapping_result[i].id)) {
+            if (!nozzle.IsEmpty()) { mapped_nozzles.push_back(nozzle); }
+        }
+
+        // Evaluate the blacklist once per resolved physical nozzle so the high-flow
+        // nozzle_flows/nozzle_diameters rules match against the real nozzle. If no nozzle context is
+        // resolvable (a non-rack printer, or a rack filament not yet mapped by the print-dispatch
+        // mapping), evaluate once with the nozzle fields unset so the non-nozzle rules still fire as
+        // before (empty nozzle_flow never matches a nozzle_flows rule).
+        const size_t iterations = mapped_nozzles.empty() ? 1 : mapped_nozzles.size();
+        for (size_t n = 0; n < iterations; ++n) {
+            if (n < mapped_nozzles.size()) {
+                const DevNozzle &nozzle    = mapped_nozzles[n];
+                check_info.extruder_id     = nozzle.GetExtruderId();
+                check_info.nozzle_flow     = DevNozzle::GetNozzleFlowTypeString(nozzle.GetNozzleFlowType());
+                check_info.nozzle_diameter = nozzle.GetNozzleDiameter();
+            }
+
+            const auto &result = DevFilaBlacklist::check_filaments_in_blacklist(check_info);
+            if (const auto &warning_items = result.get_items_by_action("warning"); !warning_items.empty()) {
+                for (const auto &item : warning_items) {
+                    confirm_text.push_back(ConfirmBeforeSendInfo(item.info_msg, item.wiki_url));
+                    has_slice_warnings = true;
+                }
+            }
         }
     }
 
@@ -2514,6 +2873,12 @@ void SelectMachineDialog::on_send_print()
     m_print_job->task_ams_mapping      = ams_mapping_array;
     m_print_job->task_ams_mapping2     = ams_mapping_array2;
     m_print_job->task_ams_mapping_info = ams_mapping_info;
+    // Print-dispatch nozzle mapping (H2C hotend rack): attach ONLY when a mapping result exists.
+    // For every non-rack printer (X1/P1/A1/H2S/H2D) the mapping json is empty, so task_nozzle_mapping
+    // stays absent and the print payload is unchanged.
+    if (!obj_->get_nozzle_mapping_result()->GetNozzleMappingJson().empty()) {
+        m_print_job->task_nozzle_mapping = obj_->get_nozzle_mapping_result()->GetNozzleMappingJson().dump();
+    }
 
     /* build nozzles info for multi extruders printers */
     if (build_nozzles_info(m_print_job->task_nozzles_info)) {
@@ -2689,6 +3054,7 @@ void SelectMachineDialog::on_set_finish_mapping(wxCommandEvent &evt)
             if (item->id == m_current_filament_id) {
                 auto ams_colour = wxColour(wxAtoi(selection_data_arr[0]), wxAtoi(selection_data_arr[1]), wxAtoi(selection_data_arr[2]), wxAtoi(selection_data_arr[3]));
                 m->set_ams_info(ams_colour, selection_data_arr[4], ctype, material_cols);
+                m->set_nozzle_info(get_mapped_nozzle_str(item->id));
             }
             iter++;
         }
@@ -2993,9 +3359,11 @@ void SelectMachineDialog::on_selection_changed(wxCommandEvent &event)
     /* reset timeout and reading printer info */
     m_status_bar->reset();
     m_timeout_count      = 0;
+    s_nozzle_mapping_last_request_time = 0;
     m_ams_mapping_res  = false;
     m_ams_mapping_valid  = false;
     m_ams_mapping_result.clear();
+    clear_nozzle_mapping();
     m_pre_print_checker.clear();
 
     m_link_edit_nozzle->Show(false);
@@ -3102,7 +3470,9 @@ void SelectMachineDialog::update_filament_change_count()
     auto best  = stats.stats_by_multi_extruder_best;
     auto curr  = stats.stats_by_multi_extruder_curr;
 
-    int hand_changes_count = curr.filament_change_count - best.filament_change_count;
+    // Per-nozzle flush_filament_change_count. Equals the per-extruder filament_change_count for
+    // single-nozzle-per-extruder printers, so this suggestion's shown value is unchanged.
+    int hand_changes_count = curr.flush_filament_change_count - best.flush_filament_change_count;
     int saving_weight      = curr.filament_flush_weight - best.filament_flush_weight;
 
     if (obj->GetExtderSystem()->GetTotalExtderCount() > 1) { m_link_edit_nozzle->Show(true); }
@@ -3425,6 +3795,10 @@ void SelectMachineDialog::update_show_status(MachineObject* obj_)
         }
     }
 
+    // Rack print-dispatch nozzle mapping (dynamic V1): request/await the printer's mapping and block
+    // Send while it computes. No-op for non-rack printers.
+    if (!CheckErrorSyncNozzleMappingResultV1(obj_)) return;
+
     if (!DevPrinterConfigUtil::support_ams_ext_mix_print(obj_->printer_type)) {
         bool useAms = _HasAms(m_ams_mapping_result);
         bool useExt = _HasExt(m_ams_mapping_result);
@@ -3444,6 +3818,10 @@ void SelectMachineDialog::update_show_status(MachineObject* obj_)
         return;
     }
 
+    // Rack print-dispatch nozzle mapping (static rack V0): consumes the validated AMS mapping, so it
+    // runs after the AMS-validity check and before the per-nozzle blacklist loop (which needs the result).
+    if (!CheckErrorSyncNozzleMappingResultV0(obj_)) return;
+
     // filaments check for black list
     for (auto i = 0; i < m_ams_mapping_result.size(); i++) {
         const auto &ams_id  = m_ams_mapping_result[i].get_ams_id();
@@ -3458,22 +3836,53 @@ void SelectMachineDialog::update_show_status(MachineObject* obj_)
             if (fs.id == m_ams_mapping_result[i].id) { filament_brand = m_filaments[i].brand; }
         }
 
-        bool        in_blacklist = false;
-        std::string action;
-        wxString info;
-        wxString wiki_url;
-        DevFilaBlacklist::check_filaments_in_blacklist_url(obj_->printer_type, filament_brand, filament_type, m_ams_mapping_result[i].filament_id, ams_id, slot_id, "", in_blacklist,
-                                                        action, info, wiki_url);
-        if (in_blacklist) {
+        DevFilaBlacklist::CheckFilamentInfo check_info;
+        check_info.dev_id      = obj_->get_dev_id();
+        check_info.model_id    = obj_->printer_type;
+        check_info.fila_id     = m_ams_mapping_result[i].filament_id;
+        check_info.fila_type   = filament_type;
+        check_info.fila_vendor = filament_brand;
+        // Populate fila_name so the high-flow warning strings (blacklist rules 14/15/18/19,
+        // "%s has a risk of nozzle clogging ...") render with the filament name instead of a
+        // leading blank. Resolves the same preset the engine's internal AMS-name recovery uses, so
+        // blacklist name-matching is unchanged.
+        if (auto option = wxGetApp().preset_bundle->get_filament_by_filament_id(check_info.fila_id))
+            check_info.fila_name = option->filament_name;
+        check_info.ams_id      = ams_id;
+        check_info.slot_id     = slot_id;
+        check_info.has_filament_switch = obj_->GetFilaSwitch()->IsInstalled();
 
-            std::vector<wxString> error_msg { info };
-            if (action == "prohibition") {
-                show_status(PrintDialogStatus::PrintStatusHasFilamentInBlackListError, error_msg, wiki_url);
+        std::vector<DevNozzle> mapped_nozzles;
+        for (const auto &[pos_id, nozzle] : get_mapped_nozzles(m_ams_mapping_result[i].id)) {
+            if (!nozzle.IsEmpty()) { mapped_nozzles.push_back(nozzle); }
+        }
+
+        // Per-physical-nozzle blacklist check — thread the nozzle the filament prints on so the
+        // high-flow prohibition/warning rules evaluate against the real nozzle flow/diameter.
+        // With no resolvable nozzle context (a non-rack printer, or a rack filament not yet mapped
+        // by the print-dispatch mapping), evaluate once with the nozzle fields unset so the
+        // non-nozzle prohibitions/warnings still fire as before.
+        const size_t iterations = mapped_nozzles.empty() ? 1 : mapped_nozzles.size();
+        for (size_t n = 0; n < iterations; ++n) {
+            if (n < mapped_nozzles.size()) {
+                const DevNozzle &nozzle    = mapped_nozzles[n];
+                check_info.extruder_id     = nozzle.GetExtruderId();
+                check_info.nozzle_flow     = DevNozzle::GetNozzleFlowTypeString(nozzle.GetNozzleFlowType());
+                check_info.nozzle_diameter = nozzle.GetNozzleDiameter();
+            }
+
+            const auto &result = DevFilaBlacklist::check_filaments_in_blacklist(check_info);
+            if (const auto &prohibition_items = result.get_items_by_action("prohibition"); !prohibition_items.empty()) {
+                for (const auto &item : prohibition_items) {
+                    show_status(PrintDialogStatus::PrintStatusHasFilamentInBlackListError, {item.info_msg}, item.wiki_url);
+                }
                 return;
             }
-            else if (action == "warning") {
-                show_status(PrintDialogStatus::PrintStatusHasFilamentInBlackListWarning, error_msg, wiki_url);/** warning check **/
-              //  return;
+
+            if (const auto &warning_items = result.get_items_by_action("warning"); !warning_items.empty()) {
+                for (const auto &item : warning_items) {
+                    show_status(PrintDialogStatus::PrintStatusHasFilamentInBlackListWarning, {item.info_msg}, item.wiki_url);/** warning check **/
+                }
             }
         }
     }
@@ -3664,6 +4073,7 @@ void SelectMachineDialog::reset_ams_material()
         wxString ams_id = "-";
         wxColour ams_col = wxColour(0xEE, 0xEE, 0xEE);
         m->set_ams_info(ams_col, ams_id);
+        m->set_nozzle_info(get_mapped_nozzle_str(id));
         iter++;
     }
 }
@@ -3968,7 +4378,7 @@ void SelectMachineDialog::reset_and_sync_ams_list()
                     m_mapping_popup.set_current_filament_id(extruder);
                     m_mapping_popup.set_tag_texture(materials[extruder]);
                     m_mapping_popup.set_send_win(this);//fix bug:fisrt click is not valid
-                    m_mapping_popup.update(obj_, m_ams_mapping_result);
+                    m_mapping_popup.update(obj_, m_ams_mapping_result, use_dynamic_nozzle_map(), m_print_type);
                     m_mapping_popup.Popup();
                 }
             }
@@ -4471,7 +4881,7 @@ void SelectMachineDialog::set_default_from_sdcard()
                     m_mapping_popup.set_current_filament_id(fo.id);
                     m_mapping_popup.set_tag_texture(fo.type);
                     m_mapping_popup.set_send_win(this);
-                    m_mapping_popup.update(obj_, m_ams_mapping_result);
+                    m_mapping_popup.update(obj_, m_ams_mapping_result, use_dynamic_nozzle_map(), m_print_type);
                     m_mapping_popup.Popup();
                 }
             }
diff --git a/src/slic3r/GUI/SelectMachine.hpp b/src/slic3r/GUI/SelectMachine.hpp
index ab88240ec0..976f130cb2 100644
--- a/src/slic3r/GUI/SelectMachine.hpp
+++ b/src/slic3r/GUI/SelectMachine.hpp
@@ -32,6 +32,7 @@
 #include "GUI_Utils.hpp"
 #include "wxExtensions.hpp"
 #include "DeviceManager.hpp"
+#include "DeviceCore/DevNozzleSystem.h" // DevNozzle (get_mapped_nozzles return type)
 #include "Plater.hpp"
 #include "BBLStatusBar.hpp"
 #include "BBLStatusBarPrint.hpp"
@@ -61,10 +62,8 @@ namespace Slic3r { namespace GUI {
 
 std::string get_nozzle_volume_type_cloud_string(NozzleVolumeType nozzle_volume_type);
 void        print_ams_mapping_result(std::vector<FilamentInfo> &result);
-enum PrintFromType {
-    FROM_NORMAL,
-    FROM_SDCARD_VIEW,
-};
+// enum PrintFromType moved to DeviceCore/DevDefs.h so shared device-mapping GUI
+// headers can name it without an include cycle. SelectMachine.hpp still sees it via DeviceManager.hpp.
 
 enum PrintPageMode {
     PrintPageModePrepare = 0,
@@ -324,6 +323,7 @@ private:
     std::vector<MachineObject*>         m_list;
     std::vector<FilamentInfo>           m_filaments;
     std::vector<FilamentInfo>           m_ams_mapping_result;
+    std::unordered_map<int, int>        m_nozzle_mapping_result; // cached rack print-dispatch mapping: filament/group id -> physical nozzle pos
     std::vector<int>                    m_filaments_map;
     std::shared_ptr<BBLStatusBarPrint>  m_status_bar;
     std::unique_ptr<Worker>             m_worker;
@@ -511,6 +511,23 @@ public:
     bool is_nozzle_type_match(DevExtderSystem data, wxString& error_message) const;
     int  convert_filament_map_nozzle_id_to_task_nozzle_id(int nozzle_id) const;
 
+    // Physical nozzle(s) a mapped filament (by filament index / FilamentInfo::id) prints on.
+    // key: nozzle pos id, value: nozzle. Used by the per-nozzle filament blacklist check loop.
+    std::map<int, DevNozzle> get_mapped_nozzles(int fila_id) const;
+
+    // Short label of the physical nozzle(s) a filament prints on, shown on its send-dialog card:
+    // rack slots ("R1", "R2 R3") for a nozzle-rack printer, or "L"/"R"/"L R" for a filament-switcher
+    // printer. Empty for printers with neither (the card then shows no nozzle row).
+    wxString get_mapped_nozzle_str(int fila_id) const;
+
+    // Rack print-dispatch nozzle mapping (H2C): request the printer's auto-mapping and consume the
+    // result, gating the Send button while the printer computes. Both are no-ops for non-rack printers.
+    bool CheckErrorSyncNozzleMappingResultV1(MachineObject* obj_);
+    bool CheckErrorSyncNozzleMappingResultV0(MachineObject* obj_);
+    void clear_nozzle_mapping();
+    bool use_dynamic_nozzle_map() const;
+    void on_flow_cali_option_changed();
+
     PrintFromType get_print_type() {return m_print_type;};
     wxString    format_steel_name(NozzleType type);
     PrintDialogStatus  get_status() { return m_print_status; }
diff --git a/src/slic3r/GUI/StatusPanel.cpp b/src/slic3r/GUI/StatusPanel.cpp
index 5cbf3e2a83..b0cc0819f6 100644
--- a/src/slic3r/GUI/StatusPanel.cpp
+++ b/src/slic3r/GUI/StatusPanel.cpp
@@ -34,6 +34,8 @@
 #include "DeviceCore/DevManager.h"
 #include "DeviceCore/DevPrintTaskInfo.h"
 
+#include "DeviceTab/wgtDeviceNozzleRack.h"
+
 
 
 #include "PrintOptionsDialog.hpp"
@@ -1611,13 +1613,26 @@ wxBoxSizer *StatusBasePanel::create_machine_control_page(wxWindow *parent)
     wxBoxSizer *bSizer_control = new wxBoxSizer(wxVERTICAL);
 
     auto temp_axis_ctrl_sizer = create_temp_axis_group(parent);
-    auto m_ams_ctrl_sizer = create_ams_group(parent);
     auto m_filament_load_sizer = create_filament_group(parent);
 
+    /* ams control box or live nozzle-rack panel (rack printers switch between the two) */
+    wxSizer *ams_rack_sizer = new wxBoxSizer(wxHORIZONTAL);
+    ams_rack_sizer->Add(create_ams_group(parent), 0, wxEXPAND | wxLEFT);
+
+    m_panel_nozzle_rack = new wgtDeviceNozzleRack(parent);
+    m_panel_nozzle_rack->Show(false);
+    ams_rack_sizer->Add(m_panel_nozzle_rack, 0, wxEXPAND | wxLEFT);
+
+    m_ams_rack_switch = new SwitchBoard(parent, _L("Filament"), _L("Hotends"), wxSize(FromDIP(126), FromDIP(26)));
+    m_ams_rack_switch->updateState("left");
+    m_ams_rack_switch->Hide();
+    m_ams_rack_switch->Bind(wxCUSTOMEVT_SWITCH_POS, &StatusBasePanel::on_ams_rack_switch, this);
+
     bSizer_control->Add(0, 0, 0, wxTOP, FromDIP(8));
     bSizer_control->Add(temp_axis_ctrl_sizer,   0, wxALIGN_CENTER|wxLEFT|wxRIGHT, FromDIP(8));
+    bSizer_control->Add(m_ams_rack_switch,      0, wxALIGN_CENTRE|wxTOP, FromDIP(6));
     bSizer_control->Add(0, 0, 0, wxTOP, FromDIP(6));
-    bSizer_control->Add(m_ams_ctrl_sizer,       0, wxALIGN_CENTER|wxLEFT|wxRIGHT, FromDIP(8));
+    bSizer_control->Add(ams_rack_sizer,         0, wxALIGN_CENTER|wxLEFT|wxRIGHT, FromDIP(8));
     bSizer_control->Add(0, 0, 0, wxTOP, FromDIP(6));
     bSizer_control->Add(m_filament_load_sizer,  0, wxALIGN_CENTER|wxLEFT|wxRIGHT, FromDIP(8));
     bSizer_control->Add(0, 0, 0, wxTOP, FromDIP(4));
@@ -2163,7 +2178,19 @@ void StatusBasePanel::expand_filament_loading(wxMouseEvent& e)
         else if (obj->is_series_o())
         {
             const auto& ext_system = obj->GetExtderSystem();
-            if (ext_system->GetTotalExtderCount() == 2)
+            // Prefer the config-driven filament-load image: H2C ships per-extruder bitmaps, and a printer
+            // fitted with an induction hotend rack picks the rack-specific set (filament_load_image_nozzle_rack).
+            // Printers whose profile carries no such key (e.g. H2D) get an empty name here and fall through to
+            // the generic O-series bitmaps below, so their monitor page stays byte-identical. Rack-driven, so
+            // there is no behavior change for any non-rack printer.
+            int  cur_ext_id      = (ext_system && ext_system->GetTotalExtderCount() > 1) ? ext_system->GetCurrentExtderId() : 0;
+            bool has_nozzle_rack = obj->GetNozzleSystem()->GetNozzleRack()->IsSupported();
+            std::string img_name = DevPrinterConfigUtil::get_filament_load_img(obj->printer_type, cur_ext_id, has_nozzle_rack);
+            if (!img_name.empty())
+            {
+                m_filament_load_img->SetBitmap(create_scaled_bitmap(img_name, this, load_img_size));
+            }
+            else if (ext_system->GetTotalExtderCount() == 2)
             {
                 int cur_extder_id = ext_system->GetCurrentExtderId();
                 if (cur_extder_id == MAIN_EXTRUDER_ID)
@@ -2202,6 +2229,10 @@ void StatusBasePanel::show_ams_group(bool show)
         wxGetApp().mainframe->m_monitor->Layout();
     }
 
+    // On rack printers, don't clobber the rack view when the user has the switch on "Hotends".
+    // Inert for every non-rack printer: the switch stays hidden, so this guard never triggers.
+    if (show && m_ams_rack_switch->IsShown() && (m_ams_rack_switch->switch_left != true)) { return; }
+
     if (m_ams_control_box->IsShown() != show) {
         m_ams_control_box->Show(show);
         m_ams_control->Layout();
@@ -2237,6 +2268,31 @@ void StatusBasePanel::show_filament_load_group(bool show)
     }
 }
 
+void StatusBasePanel::jump_to_Rack()
+{
+    if (obj && obj->GetNozzleSystem()->GetNozzleRack()->IsSupported()) {
+        m_ams_rack_switch->updateState("right");
+        m_ams_control_box->Show(false);
+        m_panel_nozzle_rack->Show(true);
+        Layout();
+    }
+}
+
+void StatusBasePanel::on_ams_rack_switch(wxCommandEvent &e)
+{
+    if (!m_ams_control_box->IsShown() && e.GetInt() == 1) {
+        m_ams_control_box->Show(e.GetInt() == 1);
+        m_panel_nozzle_rack->Show(e.GetInt() == 0);
+        Layout();
+    } else if (!m_panel_nozzle_rack->IsShown() && e.GetInt() == 0) {
+        m_ams_control_box->Show(e.GetInt() == 1);
+        m_panel_nozzle_rack->Show(e.GetInt() == 0);
+        Layout();
+    }
+
+    e.Skip();
+}
+
 void StatusPanel::update_camera_state(MachineObject* obj)
 {
     if (!obj) return;
@@ -2778,6 +2834,8 @@ void StatusPanel::update(MachineObject *obj)
     update_ams(obj);
     update_cali(obj);
 
+    update_rack(obj);
+
     if (obj) {
         //nozzle ui
         //m_button_left_of_extruder->SetSelected();
@@ -3412,7 +3470,14 @@ void StatusPanel::update_ams(MachineObject *obj)
                 int         tray_id_int = atoi(tray_id.c_str());
                 // new protocol
                 if (ams_id_int < 128) {
-                    if ((obj->tray_reading_bits & (1 << (ams_id_int * 4 + tray_id_int))) != 0) {
+                    if (ams_it->second->IsAmsLiteMixed()) {
+                        // Mixed AMS-Lite (A2L / N9) RFID-reading bits occupy positions 24..27.
+                        if ((obj->tray_reading_bits & (1 << (AMS_LITE_MIXED_TRAY_INDEX_OFFSET + tray_id_int))) != 0) {
+                            m_ams_control->PlayRridLoading(ams_id, tray_id);
+                        } else {
+                            m_ams_control->StopRridLoading(ams_id, tray_id);
+                        }
+                    } else if ((obj->tray_reading_bits & (1 << (ams_id_int * 4 + tray_id_int))) != 0) {
                         m_ams_control->PlayRridLoading(ams_id, tray_id);
                     } else {
                         m_ams_control->StopRridLoading(ams_id, tray_id);
@@ -5085,6 +5150,9 @@ void StatusPanel::set_default()
     m_ams_control->Hide();
     m_ams_control_box->Hide();
     m_ams_control->Reset();
+    m_ams_rack_switch->updateState("left");
+    m_ams_rack_switch->Hide();
+    m_panel_nozzle_rack->Hide();
     m_scale_panel->Hide();
     m_filament_load_box->Hide();
     m_filament_step->Hide();
@@ -5262,6 +5330,7 @@ void StatusPanel::msw_rescale()
     m_extruder_switching_status->msw_rescale();
 
     m_ams_control->msw_rescale();
+    m_panel_nozzle_rack->Rescale();
     // m_filament_step->Rescale();
 
 
@@ -5283,6 +5352,20 @@ void StatusPanel::msw_rescale()
     Refresh();
 }
 
+void StatusPanel::update_rack(MachineObject *obj)
+{
+    // Rack switch + live rack panel are shown only for printers whose nozzle system reports a rack
+    // (H2C). Every other Bambu printer keeps the switch hidden and the panel collapsed -> the AMS
+    // monitor page is unchanged for X1/P1/A1/H2D/H2S.
+    if (obj && obj->GetNozzleSystem()->GetNozzleRack()->IsSupported()) {
+        m_ams_rack_switch->Show();
+        m_panel_nozzle_rack->UpdateRackInfo(obj->GetNozzleSystem()->GetNozzleRack());
+    } else {
+        m_ams_rack_switch->Show(false);
+        m_panel_nozzle_rack->Show(false);
+    }
+}
+
 void StatusPanel::update_filament_loading_panel(MachineObject* obj)
 {
     if (!obj) {
diff --git a/src/slic3r/GUI/StatusPanel.hpp b/src/slic3r/GUI/StatusPanel.hpp
index 8065f198e4..d286add1b0 100644
--- a/src/slic3r/GUI/StatusPanel.hpp
+++ b/src/slic3r/GUI/StatusPanel.hpp
@@ -50,6 +50,7 @@ namespace GUI {
 
 // Previous definitions
 class MessageDialog;
+class wgtDeviceNozzleRack;
 
 enum CameraRecordingStatus {
     RECORDING_NONE,
@@ -518,11 +519,16 @@ protected:
     bool            m_show_ams_group{false};
     bool            m_show_filament_group{ false };
 
+    /* AMS control box <-> live nozzle-rack panel toggle (rack printers only) */
+    SwitchBoard*    m_ams_rack_switch{ nullptr };
+
     AMSControl*     m_ams_control;
     StaticBox*      m_ams_control_box;
     wxStaticBitmap *m_ams_extruder_img;
     wxStaticBitmap* m_bitmap_extruder_img;
 
+    wgtDeviceNozzleRack* m_panel_nozzle_rack{ nullptr };
+
     wxPanel *       m_panel_separator_right;
     wxPanel *       m_panel_separotor_bottom;
     wxGridBagSizer *m_tasklist_info_sizer{nullptr};
@@ -611,6 +617,11 @@ public:
     void           show_ams_group(bool show = true);
     void show_filament_load_group(bool show = true);
     MediaPlayCtrl* get_media_play_ctrl() {return m_media_play_ctrl;};
+
+    void jump_to_Rack();
+
+private:
+    void on_ams_rack_switch(wxCommandEvent& event);
 };
 
 
@@ -767,6 +778,7 @@ protected:
     void update_temp_ctrl(MachineObject *obj);
     void update_misc_ctrl(MachineObject *obj);
     void update_ams(MachineObject* obj);
+    void update_rack(MachineObject* obj);
     void update_filament_loading_panel(MachineObject* obj);
 
     void update_extruder_status(MachineObject* obj);
diff --git a/src/slic3r/GUI/SyncAmsInfoDialog.cpp b/src/slic3r/GUI/SyncAmsInfoDialog.cpp
index 535c561b55..5ffb321a62 100644
--- a/src/slic3r/GUI/SyncAmsInfoDialog.cpp
+++ b/src/slic3r/GUI/SyncAmsInfoDialog.cpp
@@ -1547,6 +1547,8 @@ bool SyncAmsInfoDialog::is_nozzle_type_match(DevExtderSystem data, wxString &err
             NozzleVolumeType nozzle_volume_type = (NozzleVolumeType) (nozzle_volume_type_opt->get_at(used_extruders[i]));
             if (nozzle_volume_type == NozzleVolumeType::nvtStandard) {
                 used_extruders_flow[used_extruders[i]] = "Standard";
+            } else if (nozzle_volume_type == NozzleVolumeType::nvtTPUHighFlow) {
+                used_extruders_flow[used_extruders[i]] = "TPU High Flow";
             } else {
                 used_extruders_flow[used_extruders[i]] = "High Flow";
             }
@@ -1562,6 +1564,8 @@ bool SyncAmsInfoDialog::is_nozzle_type_match(DevExtderSystem data, wxString &err
             flow_type_of_machine.push_back("High Flow");
         } else if (it->GetNozzleFlowType() == NozzleFlowType::S_FLOW) {
             flow_type_of_machine.push_back("Standard");
+        } else if (it->GetNozzleFlowType() == NozzleFlowType::U_FLOW) {
+            flow_type_of_machine.push_back("TPU High Flow");
         }
     }
 
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index f1eb41b0b4..658d658823 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -1847,6 +1847,27 @@ void Tab::on_value_change(const std::string& opt_key, const boost::any& value)
     if (opt_key == "enable_prime_tower") {
         auto timelapse_type = m_config->option<ConfigOptionEnum<TimelapseType>>("timelapse_type");
         bool timelapse_enabled = timelapse_type->value == TimelapseType::tlSmooth;
+        if (!boost::any_cast<bool>(value)) {
+            // Disabling the prime tower on a multi-nozzle printer degrades quality because nozzle changes rely
+            // on it. Gate on any extruder having extruder_max_nozzle_count > 1 so single-nozzle and dual-extruder
+            // (H2D, {1,1}) printers keep their exact existing behavior.
+            // Orca: gate on any_of(count > 1) rather than the sum of counts >= 2. The sum form would also fire for
+            // H2D ({1,1} sums to 2); any_of(>1) preserves H2D's current no-dialog behavior.
+            auto *max_nozzle_counts_opt = wxGetApp().preset_bundle->printers.get_edited_preset().config.option<ConfigOptionIntsNullable>("extruder_max_nozzle_count");
+            const bool has_multiple_nozzle = max_nozzle_counts_opt &&
+                std::any_of(max_nozzle_counts_opt->values.begin(), max_nozzle_counts_opt->values.end(),
+                            [](int v) { return v > 1 && v != ConfigOptionIntsNullable::nil_value(); });
+            if (has_multiple_nozzle) {
+                MessageDialog dlg(wxGetApp().plater(),
+                    _L("Prime tower is required for nozzle changing. There may be flaws on the model without prime tower. Are you sure you want to disable prime tower?"),
+                    _L("Warning"), wxICON_WARNING | wxYES | wxNO);
+                if (dlg.ShowModal() == wxID_NO) {
+                    DynamicPrintConfig new_conf = *m_config;
+                    new_conf.set_key_value("enable_prime_tower", new ConfigOptionBool(true));
+                    m_config_manipulation.apply(m_config, &new_conf);
+                }
+            }
+        }
         if (!boost::any_cast<bool>(value) && timelapse_enabled) {
             bool set_enable_prime_tower = false;
             MessageDialog dlg(wxGetApp().plater(), _L("A prime tower is required for smooth timelapse mode. There may be flaws on the model without a prime tower. Are you sure you want to disable the prime tower\?"),
diff --git a/src/slic3r/GUI/UpgradePanel.cpp b/src/slic3r/GUI/UpgradePanel.cpp
index 4a4ad9e947..9ff1d12709 100644
--- a/src/slic3r/GUI/UpgradePanel.cpp
+++ b/src/slic3r/GUI/UpgradePanel.cpp
@@ -3,6 +3,7 @@
 #include <slic3r/GUI/Widgets/Label.hpp>
 #include <slic3r/GUI/I18N.hpp>
 #include "slic3r/GUI/DeviceTab/uiDeviceUpdateVersion.h"
+#include "slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.h"
 
 #include "GUI.hpp"
 #include "GUI_App.hpp"
@@ -217,6 +218,9 @@ MachineInfoPanel::MachineInfoPanel(wxWindow* parent, wxWindowID id, const wxPoin
     createAirPumpWidgets(m_main_left_sizer);
     createExtinguishWidgets(m_main_left_sizer);
 
+    // nozzle rack widgets (H2C induction hotend rack; hidden unless GetNozzleRack()->IsSupported())
+    createNozzleRackWidgets(m_main_left_sizer);
+
     m_main_sizer->Add(m_main_left_sizer, 1, wxEXPAND, 0);
 
     wxBoxSizer *m_main_right_sizer = new wxBoxSizer(wxVERTICAL);
@@ -431,6 +435,7 @@ void MachineInfoPanel::init_bitmaps()
         m_img_laser          = ScalableBitmap(this, "laser", 160);
         m_img_cutting        = ScalableBitmap(this, "cut", 160);
         m_img_extinguish     = ScalableBitmap(this, "extinguish", 160);
+        m_img_nozzle_rack    = ScalableBitmap(this, "nozzle_rack", 160);
 
         upgrade_green_icon   = ScalableBitmap(this, "monitor_upgrade_online", 5);
         upgrade_gray_icon    = ScalableBitmap(this, "monitor_upgrade_offline", 5);
@@ -539,6 +544,7 @@ void MachineInfoPanel::update(MachineObject* obj)
         update_cut(obj);
         update_laszer(obj);
         update_extinguish(obj);
+        update_nozzle_rack(obj);
 
         //update progress
         int upgrade_percent = obj->get_upgrade_percent();
@@ -1257,6 +1263,80 @@ void MachineInfoPanel::show_extinguish(bool show)
     }
 }
 
+void MachineInfoPanel::createNozzleRackWidgets(wxBoxSizer *main_left_sizer)
+{
+    // horizontal line above
+    m_nozzle_rack_line_above = new wxStaticLine(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxLI_HORIZONTAL);
+    m_nozzle_rack_line_above->SetBackgroundColour(wxColour(206, 206, 206));
+    main_left_sizer->Add(m_nozzle_rack_line_above, 0, wxEXPAND | wxLEFT, FromDIP(40));
+
+    m_nozzle_rack_sizer = new wxBoxSizer(wxHORIZONTAL);
+
+    // left placeholder icon (keep consistent spacing with others)
+    m_nozzle_rack_img = new wxStaticBitmap(this, wxID_ANY, wxNullBitmap, wxDefaultPosition, wxSize(FromDIP(200), FromDIP(200)));
+    m_nozzle_rack_img->SetBitmap(m_img_nozzle_rack.bmp());
+    m_nozzle_rack_sizer->Add(m_nozzle_rack_img, 0, wxALIGN_CENTER_VERTICAL | wxALL, FromDIP(5));
+
+    // right content: label + update button
+    auto *content_sizer = new wxBoxSizer(wxHORIZONTAL);
+    m_nozzle_rack_text  = new wxStaticText(this, wxID_ANY, _L("Hotends on Rack"), wxDefaultPosition, wxDefaultSize, 0);
+    m_nozzle_rack_text->Wrap(-1);
+    m_nozzle_rack_text->SetFont(Label::Head_14);
+    content_sizer->Add(m_nozzle_rack_text, 0, wxALIGN_CENTER_VERTICAL | wxRIGHT | wxLEFT, FromDIP(50));
+
+    m_nozzle_rack_update_btn = new Button(this, _L("Info"));
+    StateColor btn_bg(std::pair<wxColour, int>(wxColour(255, 255, 255), StateColor::Disabled), std::pair<wxColour, int>(wxColour(200, 200, 200), StateColor::Pressed),
+                      std::pair<wxColour, int>(wxColour(240, 240, 240), StateColor::Hovered), std::pair<wxColour, int>(wxColour(255, 255, 255), StateColor::Enabled),
+                      std::pair<wxColour, int>(wxColour(255, 255, 255), StateColor::Normal));
+    StateColor btn_bd(std::pair<wxColour, int>(wxColour(200, 200, 200), StateColor::Disabled), std::pair<wxColour, int>(wxColour(150, 150, 150), StateColor::Enabled));
+    StateColor btn_text(std::pair<wxColour, int>(wxColour(150, 150, 150), StateColor::Disabled), std::pair<wxColour, int>(wxColour(0, 0, 0), StateColor::Enabled));
+    m_nozzle_rack_update_btn->SetBackgroundColor(btn_bg);
+    m_nozzle_rack_update_btn->SetBorderColor(btn_bd);
+    m_nozzle_rack_update_btn->SetTextColor(btn_text);
+    m_nozzle_rack_update_btn->SetFont(Label::Body_10.Bold());
+    m_nozzle_rack_update_btn->SetMinSize(wxSize(FromDIP(-1), FromDIP(24)));
+    m_nozzle_rack_update_btn->SetCornerRadius(FromDIP(12));
+    m_nozzle_rack_update_btn->Bind(wxEVT_BUTTON, &MachineInfoPanel::on_nozzle_rack_update, this);
+    content_sizer->Add(m_nozzle_rack_update_btn, 0, wxALIGN_CENTER_VERTICAL | wxLEFT, FromDIP(350));
+
+    m_nozzle_rack_sizer->Add(content_sizer, 1, wxEXPAND, 0);
+
+    main_left_sizer->Add(m_nozzle_rack_sizer, 0, wxEXPAND, 0);
+}
+
+void MachineInfoPanel::update_nozzle_rack(MachineObject* obj)
+{
+    if (obj && obj->GetNozzleSystem()) {
+        auto rack = obj->GetNozzleSystem()->GetNozzleRack();
+        if (rack && rack->IsSupported()) {
+            show_nozzle_rack(true);
+        }
+        else {
+            show_nozzle_rack(false);
+        }
+    }
+}
+
+void MachineInfoPanel::show_nozzle_rack(bool show)
+{
+    if (m_nozzle_rack_img->IsShown() != show) {
+        m_nozzle_rack_line_above->Show(show);
+        m_nozzle_rack_update_btn->Show(show);
+        m_nozzle_rack_img->Show(show);
+        m_nozzle_rack_text->Show(show);
+    }
+}
+
+void MachineInfoPanel::on_nozzle_rack_update(wxCommandEvent &event)
+{
+    if (!m_obj || !m_obj->GetNozzleSystem()) return;
+    auto rack = m_obj->GetNozzleSystem()->GetNozzleRack();
+    if (!rack) return;
+
+    wgtDeviceNozzleRackUpgradeDlg dlg(this, rack);
+    dlg.ShowModal();
+}
+
 
 void MachineInfoPanel::on_sys_color_changed()
 {
diff --git a/src/slic3r/GUI/UpgradePanel.hpp b/src/slic3r/GUI/UpgradePanel.hpp
index 2fb0f8dcb1..ef56bde03d 100644
--- a/src/slic3r/GUI/UpgradePanel.hpp
+++ b/src/slic3r/GUI/UpgradePanel.hpp
@@ -134,6 +134,13 @@ protected:
     wxStaticLine* m_extinguish_line_above = nullptr;;
     uiDeviceUpdateVersion* m_extinguish_version = nullptr;
 
+    /* nozzle rack (H2C induction hotend rack) — opens wgtDeviceNozzleRackUpgradeDlg */
+    wxBoxSizer*     m_nozzle_rack_sizer = nullptr;
+    wxStaticBitmap* m_nozzle_rack_img = nullptr;
+    wxStaticLine*   m_nozzle_rack_line_above = nullptr;
+    wxStaticText*   m_nozzle_rack_text = nullptr;
+    Button*         m_nozzle_rack_update_btn = nullptr;
+
     /* upgrade widgets */
     wxBoxSizer*     m_upgrading_sizer;
     wxStaticText *  m_staticText_upgrading_info;
@@ -155,6 +162,7 @@ protected:
     ScalableBitmap m_img_cutting;
     ScalableBitmap m_img_laser;
     ScalableBitmap m_img_extinguish;
+    ScalableBitmap m_img_nozzle_rack;
     ScalableBitmap upgrade_gray_icon;
     ScalableBitmap upgrade_green_icon;
     ScalableBitmap upgrade_yellow_icon;
@@ -212,16 +220,21 @@ private:
     void createCuttingWidgets(wxBoxSizer* main_left_sizer);
     void createLaserWidgets(wxBoxSizer* main_left_sizer);
     void createExtinguishWidgets(wxBoxSizer* main_left_sizer);
+    void createNozzleRackWidgets(wxBoxSizer* main_left_sizer);
 
     void update_air_pump(MachineObject* obj);
     void update_cut(MachineObject* obj);
     void update_laszer(MachineObject* obj);
     void update_extinguish(MachineObject* obj);
+    void update_nozzle_rack(MachineObject* obj);
 
     void show_air_pump(bool show = true);
     void show_cut(bool show = true);
     void show_laszer(bool show = true);
     void show_extinguish(bool show = true);
+    void show_nozzle_rack(bool show = true);
+
+    void on_nozzle_rack_update(wxCommandEvent& event);
 };
 
 //enum UpgradeMode {
diff --git a/src/slic3r/GUI/Widgets/MultiNozzleSync.cpp b/src/slic3r/GUI/Widgets/MultiNozzleSync.cpp
new file mode 100644
index 0000000000..9bcf3e234c
--- /dev/null
+++ b/src/slic3r/GUI/Widgets/MultiNozzleSync.cpp
@@ -0,0 +1,1215 @@
+#include "MultiNozzleSync.hpp"
+
+#include "../GUI_App.hpp"
+#include "../I18N.hpp"
+#include "../Plater.hpp"
+#include "../DeviceManager.hpp"
+#include "../DeviceCore/DevConfigUtil.h"
+#include "../DeviceCore/DevNozzleSystem.h"
+#include "../wxExtensions.hpp"
+#include "Button.hpp"
+#include "Label.hpp"
+#include "StaticBox.hpp"
+#include "libslic3r/PresetBundle.hpp"
+#include "libslic3r/Utils.hpp"
+
+#include <algorithm>
+#include <cmath>
+#include <map>
+#include <numeric>
+#include <set>
+
+#include <wx/choice.h>
+#include <wx/sizer.h>
+#include <wx/stattext.h>
+
+namespace Slic3r { namespace GUI {
+
+wxDEFINE_EVENT(EVT_NOZZLE_SELECTED, wxCommandEvent);
+
+static const int LeftExtruderIdx = 0;
+static const int RightExtruderIdx = 1;
+
+// ---- extruder_nozzle_stats config helpers ---------------------------------------------------------------------
+// Orca: nozzle stats have no live runtime object; they are stored in the printer preset's `extruder_nozzle_stats`
+// config key (ConfigOptionStrings, one encoded map per extruder) via get_extruder_nozzle_stats /
+// save_extruder_nozzle_stats_to_string. These helpers read and write that config.
+
+static int extruder_nozzle_count(PresetBundle *preset_bundle, int extruder_id, NozzleVolumeType volume_type)
+{
+    if (!preset_bundle)
+        return 0;
+    auto *opt = preset_bundle->printers.get_edited_preset().config.option<ConfigOptionStrings>("extruder_nozzle_stats");
+    if (!opt)
+        return 0;
+    const auto stats = get_extruder_nozzle_stats(opt->values);
+    if (extruder_id < 0 || extruder_id >= (int) stats.size())
+        return 0;
+    const auto it = stats[extruder_id].find(volume_type);
+    return it == stats[extruder_id].end() ? 0 : it->second;
+}
+
+static int extruder_nozzle_count_total(PresetBundle *preset_bundle, int extruder_id)
+{
+    if (!preset_bundle)
+        return 0;
+    auto *opt = preset_bundle->printers.get_edited_preset().config.option<ConfigOptionStrings>("extruder_nozzle_stats");
+    if (!opt)
+        return 0;
+    const auto stats = get_extruder_nozzle_stats(opt->values);
+    if (extruder_id < 0 || extruder_id >= (int) stats.size())
+        return 0;
+    int sum = 0;
+    for (const auto &kv : stats[extruder_id])
+        sum += kv.second;
+    return sum;
+}
+
+// ---- ManualNozzleCountDialog ----------------------------------------------------------------------------------
+
+ManualNozzleCountDialog::ManualNozzleCountDialog(
+    wxWindow *parent, NozzleVolumeType volume_type, int standard_count, int highflow_count, int max_nozzle_count, bool force_no_zero)
+    : DPIDialog(parent, wxID_ANY, _L("Set nozzle count"), wxDefaultPosition, wxDefaultSize, wxCAPTION | wxCLOSE_BOX)
+{
+    SetBackgroundColour(*wxWHITE);
+
+    wxPanel *content = new wxPanel(this);
+    content->SetBackgroundColour(*wxWHITE);
+    wxBoxSizer *content_sizer = new wxBoxSizer(wxHORIZONTAL);
+    content->SetSizer(content_sizer);
+
+    wxBoxSizer *choice_sizer = new wxBoxSizer(wxVERTICAL);
+    choice_sizer->Add(new wxStaticText(content, wxID_ANY, _L("Please set nozzle count")), 0, wxALL | wxALIGN_LEFT, FromDIP(10));
+
+    wxArrayString nozzle_choices;
+    for (int i = 0; i <= max_nozzle_count; ++i)
+        nozzle_choices.Add(wxString::Format("%d", i));
+
+    // Orca's NozzleVolumeType is {Standard, High Flow} (no Hybrid), so exactly one choice is shown per dialog.
+    if (volume_type == nvtStandard) {
+        choice_sizer->Add(new wxStaticText(content, wxID_ANY, _L(get_nozzle_volume_type_string(nvtStandard))), 0, wxALL | wxALIGN_LEFT, FromDIP(5));
+        m_standard_choice = new wxChoice(content, wxID_ANY, wxDefaultPosition, wxSize(FromDIP(100), -1), nozzle_choices);
+        m_standard_choice->SetSelection(standard_count);
+        choice_sizer->Add(m_standard_choice, 0, wxLEFT | wxBOTTOM | wxRIGHT, FromDIP(10));
+    }
+    if (volume_type == nvtHighFlow) {
+        choice_sizer->Add(new wxStaticText(content, wxID_ANY, _L(get_nozzle_volume_type_string(nvtHighFlow))), 0, wxALL | wxALIGN_LEFT, FromDIP(5));
+        m_highflow_choice = new wxChoice(content, wxID_ANY, wxDefaultPosition, wxSize(FromDIP(100), -1), nozzle_choices);
+        m_highflow_choice->SetSelection(highflow_count);
+        choice_sizer->Add(m_highflow_choice, 0, wxLEFT | wxBOTTOM | wxRIGHT, FromDIP(10));
+    }
+
+    m_error_label = new wxStaticText(this, wxID_ANY, "");
+    m_error_label->SetForegroundColour(wxColour("#E14747"));
+    m_error_label->Hide();
+
+    auto update_nozzle_error = [this, force_no_zero, content, max_nozzle_count](int standard_count, int highflow_count) {
+        const int total_count = standard_count + highflow_count;
+        if (0 < total_count && total_count <= max_nozzle_count && m_error_label->IsShown()) {
+            m_error_label->Hide();
+            m_confirm_btn->Enable();
+            Layout();
+            Fit();
+        } else if ((total_count == 0 && force_no_zero) || total_count > max_nozzle_count) {
+            const wxString error_tip = total_count == 0 ? _L("Error: Can not set both nozzle count to zero.")
+                                                        : wxString::Format(_L("Error: Nozzle count can not exceed %d."), max_nozzle_count);
+            m_error_label->SetLabel(error_tip);
+            m_error_label->Wrap(content->GetSize().x);
+            m_error_label->Show();
+            m_confirm_btn->Disable();
+            Layout();
+            Fit();
+        }
+    };
+
+    if (m_standard_choice)
+        m_standard_choice->Bind(wxEVT_CHOICE, [this, update_nozzle_error](wxCommandEvent &e) {
+            update_nozzle_error(m_standard_choice->GetSelection(), m_highflow_choice ? m_highflow_choice->GetSelection() : 0);
+            e.Skip();
+        });
+    if (m_highflow_choice)
+        m_highflow_choice->Bind(wxEVT_CHOICE, [this, update_nozzle_error](wxCommandEvent &e) {
+            update_nozzle_error(m_standard_choice ? m_standard_choice->GetSelection() : 0, m_highflow_choice->GetSelection());
+            e.Skip();
+        });
+
+    content_sizer->Add(choice_sizer, 0, wxALIGN_CENTRE_VERTICAL);
+
+    m_confirm_btn = new Button(this, _L("Confirm"));
+    m_confirm_btn->SetStyle(ButtonStyle::Confirm, ButtonType::Window);
+    m_confirm_btn->Bind(wxEVT_BUTTON, [this](wxCommandEvent &) { EndModal(wxID_OK); });
+
+    wxBoxSizer *main_sizer = new wxBoxSizer(wxVERTICAL);
+    main_sizer->Add(content, 1, wxEXPAND);
+    main_sizer->Add(m_error_label, 0, wxALL, FromDIP(5));
+    main_sizer->Add(m_confirm_btn, 0, wxALIGN_CENTER_HORIZONTAL | wxBOTTOM, FromDIP(20));
+
+    SetSizerAndFit(main_sizer);
+    CentreOnParent();
+    wxGetApp().UpdateDlgDarkUI(this);
+}
+
+int ManualNozzleCountDialog::GetNozzleCount(NozzleVolumeType volume_type) const
+{
+    if (volume_type == nvtStandard)
+        return m_standard_choice ? m_standard_choice->GetSelection() : 0;
+    if (volume_type == nvtHighFlow)
+        return m_highflow_choice ? m_highflow_choice->GetSelection() : 0;
+    return 0;
+}
+
+// ---- free functions -------------------------------------------------------------------------------------------
+
+void setExtruderNozzleCount(PresetBundle *preset_bundle, int extruder_id, NozzleVolumeType volume_type, int nozzle_count, bool clear_all)
+{
+    if (!preset_bundle)
+        return;
+    auto &config = preset_bundle->printers.get_edited_preset().config;
+    auto *opt    = config.option<ConfigOptionStrings>("extruder_nozzle_stats", true);
+    if (!opt)
+        return;
+
+    const int extruder_count = preset_bundle->get_printer_extruder_count();
+    auto      stats          = get_extruder_nozzle_stats(opt->values);
+    if ((int) stats.size() < extruder_count)
+        stats.resize(extruder_count);
+    if (extruder_id < 0 || extruder_id >= (int) stats.size())
+        return;
+
+    if (clear_all)
+        stats[extruder_id].clear();
+    stats[extruder_id][volume_type] = nozzle_count;
+    opt->values                     = save_extruder_nozzle_stats_to_string(stats);
+}
+
+bool nozzle_diameter_supports_tpu_high_flow(double nozzle_diameter)
+{
+    // "Direct Drive TPU High Flow" is offered only on the H2D/H2D Pro 0.4 and 0.6 nozzles.
+    constexpr double kEps = 0.01;
+    return std::fabs(nozzle_diameter - 0.4) < kEps || std::fabs(nozzle_diameter - 0.6) < kEps;
+}
+
+bool extruder_supports_tpu_high_flow(PresetBundle *preset_bundle, int extruder_id)
+{
+    if (!preset_bundle)
+        return false;
+    const auto *nozzle_diameter = preset_bundle->printers.get_edited_preset().config.option<ConfigOptionFloats>("nozzle_diameter");
+    return nozzle_diameter != nullptr && extruder_id >= 0 && extruder_id < (int) nozzle_diameter->values.size() &&
+           nozzle_diameter_supports_tpu_high_flow(nozzle_diameter->values[extruder_id]);
+}
+
+void updateNozzleCountDisplay(PresetBundle *preset_bundle, int extruder_id, NozzleVolumeType volume_type)
+{
+    // Orca: the sidebar ExtruderGroup has no per-extruder nozzle-count badge yet, so this refresh is a no-op. The
+    // authoritative count already lives in the extruder_nozzle_stats config written by setExtruderNozzleCount; kept
+    // as the wiring point for that future UI.
+    (void) preset_bundle;
+    (void) extruder_id;
+    (void) volume_type;
+}
+
+void manuallySetNozzleCount(int extruder_id)
+{
+    PresetBundle *preset_bundle = wxGetApp().preset_bundle;
+    if (!preset_bundle)
+        return;
+
+    DynamicPrintConfig full_config      = preset_bundle->full_config();
+    auto              *max_nozzle_count = full_config.option<ConfigOptionIntsNullable>("extruder_max_nozzle_count");
+    // Multi-nozzle gate: no-op for every single-nozzle / dual-extruder ({1,1}) printer.
+    // Skip nil entries: a nullable-int nil is INT_MAX (> 1) and would otherwise falsely pass the gate.
+    if (!max_nozzle_count ||
+        !std::any_of(max_nozzle_count->values.begin(), max_nozzle_count->values.end(),
+                     [](int v) { return v > 1 && v != ConfigOptionIntsNullable::nil_value(); }))
+        return;
+
+    auto *nozzle_volume_type_opt = full_config.option<ConfigOptionEnumsGeneric>("nozzle_volume_type");
+    if (!nozzle_volume_type_opt || extruder_id < 0 || extruder_id >= (int) nozzle_volume_type_opt->values.size() ||
+        extruder_id >= (int) max_nozzle_count->values.size())
+        return;
+
+    const NozzleVolumeType volume_type    = NozzleVolumeType(nozzle_volume_type_opt->values[extruder_id]);
+    const int              standard_count = extruder_nozzle_count(preset_bundle, extruder_id, nvtStandard);
+    const int              highflow_count = extruder_nozzle_count(preset_bundle, extruder_id, nvtHighFlow);
+
+    // Require at least one nozzle when the other extruder currently has none.
+    bool force_no_zero = false;
+    if (nozzle_volume_type_opt->values.size() > 1)
+        force_no_zero = extruder_nozzle_count_total(preset_bundle, 1 - extruder_id) == 0;
+
+    ManualNozzleCountDialog dialog(wxGetApp().plater(), volume_type, standard_count, highflow_count, max_nozzle_count->values[extruder_id], force_no_zero);
+    if (dialog.ShowModal() == wxID_OK) {
+        setExtruderNozzleCount(preset_bundle, extruder_id, volume_type, dialog.GetNozzleCount(volume_type), true);
+        updateNozzleCountDisplay(preset_bundle, extruder_id, volume_type);
+        wxGetApp().plater()->update();
+    }
+}
+
+// ==== device-sync half ====
+
+ExtruderBadge::ExtruderBadge(wxWindow* parent) : wxPanel(parent)
+{
+    wxSizer* main_sizer = new wxBoxSizer(wxVERTICAL);
+    SetBackgroundColour("#F8F8F8");
+    wxBitmap icon = create_scaled_bitmap("extruder_badge_none_selected", nullptr, FromDIP(90));
+
+    auto extruder_label = new Label(this, _L("Extruder"));
+
+    badget = new wxStaticBitmap(this, wxID_ANY, icon);
+
+    m_diameter_list = { "0.4","0.4" };
+    m_volume_type_list = { NozzleVolumeType::nvtStandard,NozzleVolumeType::nvtStandard };
+
+    left_diameter_desp = new Label(this, _L(m_diameter_list[LeftExtruderIdx]));
+    right_diameter_desp = new Label(this, _L(m_diameter_list[RightExtruderIdx]));
+    left_flow_desp = new Label(this, _L(get_nozzle_volume_type_string(m_volume_type_list[LeftExtruderIdx])));
+    right_flow_desp = new Label(this, _L(get_nozzle_volume_type_string(m_volume_type_list[RightExtruderIdx])));
+
+
+    wxBoxSizer* top_h = new wxBoxSizer(wxVERTICAL);
+    top_h->Add(extruder_label, 0, wxALIGN_CENTER | wxBOTTOM, FromDIP(10));
+
+    main_sizer->Add(top_h, 0, wxEXPAND | wxTOP, FromDIP(5));
+    main_sizer->Add(badget, 0, wxALIGN_CENTER | wxTOP, FromDIP(5));
+
+    wxBoxSizer* left_extruder = new wxBoxSizer(wxVERTICAL);
+
+    left_extruder->Add(left_diameter_desp, 0, wxALIGN_CENTER | wxLEFT, FromDIP(12));
+    left_extruder->Add(left_flow_desp, 0, wxALIGN_CENTER | wxLEFT, FromDIP(12));
+
+    wxBoxSizer* right_extruder = new wxBoxSizer(wxVERTICAL);
+    right_extruder->Add(right_diameter_desp, 0, wxALIGN_CENTER | wxRIGHT, FromDIP(12));
+    right_extruder->Add(right_flow_desp, 0, wxALIGN_CENTER | wxRIGHT, FromDIP(12));
+
+    wxBoxSizer* info_sizer = new wxBoxSizer(wxHORIZONTAL);
+    info_sizer->Add(left_extruder, 0);
+    info_sizer->AddStretchSpacer();
+    info_sizer->Add(right_extruder, 0);
+
+    main_sizer->Add(info_sizer, 0, wxEXPAND | wxTOP, FromDIP(5));
+
+    SetSizer(main_sizer);
+    Layout();
+    Fit();
+    wxGetApp().UpdateDarkUIWin(this);
+}
+
+void ExtruderBadge::SetExtruderInfo(int extruder_id, const std::string& diameter, const NozzleVolumeType& volume_type)
+{
+    m_diameter_list[extruder_id] = diameter;
+    m_volume_type_list[extruder_id] = volume_type;
+
+    if (extruder_id == LeftExtruderIdx) {
+        left_diameter_desp->SetLabel(diameter + " mm");
+        left_flow_desp->SetLabel(_L(get_nozzle_volume_type_string(volume_type)));
+    }
+    else if (extruder_id == RightExtruderIdx) {
+        right_diameter_desp->SetLabel(diameter + " mm");
+        right_flow_desp->SetLabel(_L(get_nozzle_volume_type_string(volume_type)));
+    }
+}
+
+void ExtruderBadge::SetExtruderValid(bool right_on)
+{
+    if (!right_on) {
+        right_diameter_desp->SetLabel("");
+        right_flow_desp->SetLabel("");
+    }
+    std::string badge_name;
+    if (m_right_on)
+        badge_name = "extruder_badge_none_selected";
+    else
+        badge_name = "extruder_badge_none_selected_single";
+    wxBitmap icon = create_scaled_bitmap(badge_name, nullptr, FromDIP(90));
+    badget->SetBitmap(icon);
+
+    m_right_on = right_on;
+}
+
+void ExtruderBadge::SetExtruderStatus(bool left_selected, bool right_selected)
+{
+    std::string badge_name;
+    if (m_right_on) {
+        if (left_selected && right_selected)
+            badge_name = "extruder_badge_both_selected";
+        else if (left_selected)
+            badge_name = "extruder_badge_left_selected";
+        else if (right_selected)
+            badge_name = "extruder_badge_right_selected";
+        else
+            badge_name = "extruder_badge_none_selected";
+    }
+    else if (left_selected) {
+        badge_name = "extruder_badge_left_selected_single";
+    }
+    else {
+        badge_name = "extruder_badge_none_selected_single";
+    }
+
+    wxBitmap icon = create_scaled_bitmap(badge_name, nullptr, FromDIP(90));
+    badget->SetBitmap(icon);
+    Layout();
+}
+
+
+void ExtruderBadge::UnMarkRelatedItems(const NozzleOption& option)
+{
+    bool left_selected = true, right_selected = true;
+
+    if (m_diameter_list[LeftExtruderIdx] == option.diameter && option.extruder_nozzle_stats.count(LeftExtruderIdx)
+        && option.extruder_nozzle_stats.at(LeftExtruderIdx).count(m_volume_type_list[LeftExtruderIdx])
+        && option.extruder_nozzle_stats.at(LeftExtruderIdx).at(m_volume_type_list[LeftExtruderIdx])>0)
+        left_selected = false;
+
+    if (m_diameter_list[RightExtruderIdx] == option.diameter && option.extruder_nozzle_stats.count(RightExtruderIdx)
+        && option.extruder_nozzle_stats.at(RightExtruderIdx).count(m_volume_type_list[RightExtruderIdx])
+        && option.extruder_nozzle_stats.at(RightExtruderIdx).at(m_volume_type_list[RightExtruderIdx])>0)
+        right_selected = false;
+
+    SetExtruderStatus(left_selected, right_selected);
+}
+
+void ExtruderBadge::MarkRelatedItems(const NozzleOption& option)
+{
+    bool left_selected = false, right_selected = false;
+
+    if (m_diameter_list[LeftExtruderIdx] == option.diameter && option.extruder_nozzle_stats.count(LeftExtruderIdx)
+        && option.extruder_nozzle_stats.at(LeftExtruderIdx).count(m_volume_type_list[LeftExtruderIdx])
+        && option.extruder_nozzle_stats.at(LeftExtruderIdx).at(m_volume_type_list[LeftExtruderIdx]) > 0)
+        left_selected = true;
+
+    if (m_diameter_list[RightExtruderIdx] == option.diameter && option.extruder_nozzle_stats.count(RightExtruderIdx)
+        && option.extruder_nozzle_stats.at(RightExtruderIdx).count(m_volume_type_list[RightExtruderIdx])
+        && option.extruder_nozzle_stats.at(RightExtruderIdx).at(m_volume_type_list[RightExtruderIdx]) > 0)
+        right_selected = true;
+
+    SetExtruderStatus(left_selected, right_selected);
+}
+
+HotEndTable::HotEndTable(wxWindow* parent) :  wxPanel(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,wxBORDER_NONE)
+{
+    Bind(wxEVT_PAINT, &HotEndTable::OnPaint, this);
+    auto main_sizer = new wxBoxSizer(wxVERTICAL);
+    auto label = new Label(this, _L("Induction Hotend Rack"));
+    label->SetBackgroundColour("#F8F8F8");
+
+    m_arow_nozzle_box = CreateNozzleBox({ 0,2,4 });
+    m_brow_nozzle_box = CreateNozzleBox({ 1,3,5 });
+    main_sizer->Add(label, 0, wxALIGN_CENTER_HORIZONTAL | wxTOP | wxBOTTOM, FromDIP(5));
+    main_sizer->Add(m_arow_nozzle_box, 0, wxLEFT | wxRIGHT, FromDIP(5));
+    main_sizer->Add(m_brow_nozzle_box, 0, wxLEFT | wxRIGHT, FromDIP(5));
+    SetBackgroundColour("#F8F8F8");
+
+    SetSizer(main_sizer);
+    Layout();
+    Fit();
+    wxGetApp().UpdateDarkUIWin(this);
+}
+
+void HotEndTable::UpdateRackInfo(std::weak_ptr<DevNozzleRack> rack)
+{
+    m_nozzle_rack = rack;
+    const auto& nozzle_rack = rack.lock();
+    if (nozzle_rack) {
+        UpdateNozzleItems(m_nozzle_items, nozzle_rack);
+    }
+}
+
+std::vector<int> HotEndTable::FilterHotEnds(const NozzleOption& option)
+{
+    auto rack = m_nozzle_rack.lock();
+    if (!rack)
+        return {};
+
+    std::vector<HotEndAttr> nozzles_to_search;
+
+    for (auto& item : option.extruder_nozzle_stats) {
+        for (auto& nozzle : item.second) {
+            HotEndAttr info;
+            info.diameter = option.diameter;
+            info.extruder_id = item.first;
+            info.volume_type = nozzle.first;
+            nozzles_to_search.emplace_back(info);
+        }
+    }
+
+    std::vector<int> filtered_nozzles;
+
+    for (auto& info : nozzles_to_search) {
+
+        float diameter = atof(info.diameter.c_str());
+        NozzleFlowType flow = DevNozzle::ToNozzleFlowType(info.volume_type);
+        int extruder_id = 1 - info.extruder_id; //physical
+
+        auto nozzles = rack->GetNozzleSystem()->CollectNozzles(extruder_id, flow, diameter);
+
+        for (auto& nozzle : nozzles) {
+            if (nozzle.IsOnRack())
+                filtered_nozzles.emplace_back(nozzle.GetNozzleId());
+        }
+    }
+
+    return filtered_nozzles;
+}
+
+void HotEndTable::MarkRelatedItems(const NozzleOption& option)
+{
+    const static StateColor bg_green(
+        std::pair<wxColour, int>(wxColour("#DBFDE7"), StateColor::Normal)
+    );
+
+    const static StateColor bd_green(
+        std::pair<wxColour, int>(wxColour("#00AE42"), StateColor::Normal)
+    );
+    auto filtered_nozzles = FilterHotEnds(option);
+    for (auto nozzle_id : filtered_nozzles) {
+        auto iter = m_nozzle_items.find(nozzle_id);
+        if (iter == m_nozzle_items.end())
+            continue;
+        auto& item = iter->second;
+        item->SetBackgroundColor(bg_green);
+        item->SetBorderColor(bd_green);
+        for (auto child : item->GetChildren()) {
+            child->SetBackgroundColour("#DBFDE7");
+        }
+    }
+    wxGetApp().UpdateDarkUIWin(this);
+}
+
+void HotEndTable::UnMarkRelatedItems(const NozzleOption& option)
+{
+    static const wxColour bg_color("#EEEEEE");
+    static const wxColour bd_color("#CECECE");
+    const static StateColor bg_green(
+        std::pair<wxColour, int>(bg_color, StateColor::Normal)
+    );
+
+    const static StateColor bd_green(
+        std::pair<wxColour, int>(bd_color, StateColor::Normal)
+    );
+    auto filtered_nozzles = FilterHotEnds(option);
+    for (auto nozzle_id : filtered_nozzles) {
+        auto iter = m_nozzle_items.find(nozzle_id);
+        if (iter == m_nozzle_items.end())
+            continue;
+        auto& item = iter->second;
+        item->SetBackgroundColor(bg_green);
+        item->SetBorderColor(bd_green);
+        for (auto child : item->GetChildren()) {
+            child->SetBackgroundColour(bg_color);
+        }
+    }
+    wxGetApp().UpdateDarkUIWin(this);
+}
+
+
+
+StaticBox* HotEndTable::CreateNozzleBox(const std::vector<int>& nozzle_indices)
+{
+    StaticBox* nozzle_box = new StaticBox(this);
+    nozzle_box->SetBackgroundColour("#F8F8F8");
+    nozzle_box->SetBorderColorNormal("#F8F8F8");
+    nozzle_box->SetCornerRadius(0);
+
+    wxSizer* h_sizer = new wxBoxSizer(wxHORIZONTAL);
+    for (auto idx : nozzle_indices) {
+        wgtDeviceNozzleRackNozzleItem* nozzle_item = new wgtDeviceNozzleRackNozzleItem(nozzle_box, idx);
+        nozzle_item->SetBackgroundColorNormal("#EEEEEE");
+        for (auto& child : nozzle_item->GetChildren())
+            child->SetBackgroundColour("#EEEEEE");
+        m_nozzle_items[idx] = nozzle_item;
+        h_sizer->Add(nozzle_item, 0, wxALL, FromDIP(8));
+    }
+
+    nozzle_box->SetSizer(h_sizer);
+
+    return nozzle_box;
+}
+
+void HotEndTable::UpdateNozzleItems(const std::unordered_map<int, wgtDeviceNozzleRackNozzleItem*>& nozzle_items, std::shared_ptr<DevNozzleRack> nozzle_rack)
+{
+    for (auto& item : nozzle_items)
+        item.second->Update(nozzle_rack);
+}
+
+void HotEndTable::OnPaint(wxPaintEvent& evt)
+{
+    wxPaintDC dc(this);
+    wxSize size = GetClientSize();
+
+    dc.SetPen(wxPen(wxColour("#EEEEEE"), 2));
+    dc.SetBrush(*wxTRANSPARENT_BRUSH);
+    dc.DrawRoundedRectangle(0, 0, size.GetWidth()-2, size.GetHeight()-2, 5);
+}
+
+NozzleListTable::NozzleListTable(wxWindow* parent) : wxPanel(parent,wxID_ANY,wxDefaultPosition,wxDefaultSize ,wxNO_BORDER)
+{
+    m_web_view = wxWebView::New(this, wxID_ANY, wxEmptyString, wxDefaultPosition,wxDefaultSize,wxString::FromAscii(wxWebViewBackendDefault),wxNO_BORDER);
+    m_web_view->AddScriptMessageHandler("nozzleListTable");
+    m_web_view->EnableContextMenu(false);
+    fs::path filepath = fs::path(resources_dir()) / "web/flush/NozzleListTable.html";
+    wxFileName fn(wxString::FromUTF8(filepath.string()));
+    wxString url = wxFileSystem::FileNameToURL(fn);
+    m_web_view->LoadURL(url);
+
+    auto sizer = new wxBoxSizer(wxVERTICAL);
+    sizer->AddStretchSpacer(0);
+    sizer->Add(m_web_view, 1, wxEXPAND);
+    sizer->AddStretchSpacer(0);
+    SetSizer(sizer);
+    Layout();
+
+    m_web_view->Bind(wxEVT_WEBVIEW_SCRIPT_MESSAGE_RECEIVED, [this,sizer](wxWebViewEvent& evt) {
+        std::string message = evt.GetString().ToStdString();
+        BOOST_LOG_TRIVIAL(debug) << __FUNCTION__ << "Received message: " << message;
+        try {
+            json j = json::parse(message);
+            if (j["msg"].get<std::string>() == "init") {
+                auto table_obj_str = BuildTableObjStr();
+                auto text_obj_str = BuildTextObjStr();
+                CallAfter([table_obj_str, text_obj_str, this] {
+                    wxString script1 = wxString::Format("initText(%s)", text_obj_str);
+                    m_web_view->RunScript(script1);
+                    wxString script2 = wxString::Format("initTable(%s)", table_obj_str);
+                    m_web_view->RunScript(script2);
+                    });
+            }
+            else if (j["msg"].get<std::string>() == "updateList") {
+                auto table_obj_str = BuildTableObjStr();
+
+                CallAfter([table_obj_str, this] {
+                    wxString script1 = wxString::Format("updateTable(%s)", table_obj_str);
+                    m_web_view->RunScript(script1);
+                    });
+
+            }
+            else if (j["msg"].get<std::string>() == "onSelect") {
+                int idx = j["index"].get<int>();
+                m_selected_idx = idx;
+                SendSelectionChangedEvent();
+            }
+            else if (j["msg"].get<std::string>() == "layout") {
+                int height = j["height"].get<int>();
+                int width = j["width"].get<int>();
+                wxSize table_size = wxSize(-1, FromDIP(height));
+                m_web_view->SetSize(table_size);
+                m_web_view->SetMaxSize(table_size);
+                m_web_view->SetMinSize(table_size);
+                this->Layout();
+                this->GetParent()->Layout();
+                this->GetParent()->Fit();
+            }
+        }
+        catch (...) {
+            BOOST_LOG_TRIVIAL(error) << __FUNCTION__ << "Failed to parse json message: " << message;
+        }
+        });
+
+    wxGetApp().UpdateDarkUIWin(this);
+}
+
+wxString NozzleListTable::BuildTableObjStr()
+{
+    json obj;
+    obj["darkmode"] = wxGetApp().dark_mode();
+    obj["data"] = json::array();
+    for(size_t idx = 0; idx < m_nozzle_options.size(); ++idx){
+        const auto& option = m_nozzle_options[idx];
+        json json_opt;
+        json_opt["diameter"] = option.diameter;
+        json_opt["is_selected"] = idx == m_selected_idx;
+        json_opt["darkmode"] = wxGetApp().dark_mode();
+
+        json extruders = json::object();
+        for (const auto& [extruderId, nozzleInfo] : option.extruder_nozzle_stats) {
+            nlohmann::json nozzleData;
+            nozzleData["type"] = "";
+            nozzleData["count"] = std::accumulate(nozzleInfo.begin(), nozzleInfo.end(), 0, [](int val, auto elem) {return val + elem.second; });
+            extruders[std::to_string(extruderId)] = nozzleData;
+        }
+        json_opt["extruders"] = extruders;
+        obj["data"].push_back(json_opt);
+    }
+    return wxString::FromUTF8(obj.dump().c_str());
+}
+
+void NozzleListTable::SendSelectionChangedEvent()
+{
+    wxCommandEvent event(EVT_NOZZLE_SELECTED, GetId());
+    event.SetInt(m_selected_idx);
+    event.SetEventObject(this);
+    ProcessWindowEvent(event);
+}
+wxString NozzleListTable::BuildTextObjStr()
+{
+    wxString nozzle_selection = _L("Nozzle Selection");
+    wxString nozzle_list = _L("Available Nozzles");
+    std::string pt = wxGetApp().preset_bundle->printers.get_edited_preset().get_printer_type(wxGetApp().preset_bundle);
+    wxString Left = _L(DevPrinterConfigUtil::get_toolhead_display_name(pt, DEPUTY_EXTRUDER_ID, ToolHeadComponent::Extruder, ToolHeadNameCase::TitleCase, true));
+    wxString Right = _L(DevPrinterConfigUtil::get_toolhead_display_name(pt, MAIN_EXTRUDER_ID, ToolHeadComponent::Extruder, ToolHeadNameCase::TitleCase, true));
+    wxString highflow = _L(get_nozzle_volume_type_string(nvtHighFlow));
+    wxString standard = _L(get_nozzle_volume_type_string(nvtStandard));
+
+    wxString text_obj = "{";
+    text_obj += wxString::Format("\"nozzle_selection_label\":\"%s\",", nozzle_selection);
+    text_obj += wxString::Format("\"nozzle_list_label\":\"%s\",", nozzle_list);
+    text_obj += wxString::Format("\"left_label\":\"%s\",", Left);
+    text_obj += wxString::Format("\"right_label\":\"%s\",", Right);
+    text_obj += wxString::Format("\"highflow_label\":\"%s\",", highflow);
+    text_obj += wxString::Format("\"standard_label\":\"%s\",", standard);
+    text_obj += wxString::Format("\"language\":\"%s\"", wxGetApp().app_config->get_language_code());
+    text_obj += "}";
+
+    return text_obj;
+}
+
+void NozzleListTable::SetOptions(const std::vector<NozzleOption>& options,int default_select)
+{
+    m_nozzle_options = options;
+    m_selected_idx = default_select;
+    auto table_obj_str = BuildTableObjStr();
+    wxString script1 = wxString::Format("updateTable(%s)", table_obj_str);
+    BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << "update table " << script1;
+
+#if 1
+    m_web_view->RunScript(script1);
+#else
+    CallAfter([script1, this]() {
+        m_web_view->RunScript(script1);
+        });
+#endif
+}
+
+MultiNozzleStatusTable::MultiNozzleStatusTable(wxWindow* parent): wxPanel(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxBORDER_NONE)
+{
+    m_badge = new ExtruderBadge(this);
+
+    SetBackgroundColour(wxColour("#F8F8F8"));
+
+    auto main_sizer    = new wxBoxSizer(wxVERTICAL);
+
+    auto title_panel = new wxPanel(this);
+    title_panel->SetBackgroundColour(0xEEEEEE);
+    auto title_sizer = new wxBoxSizer(wxHORIZONTAL);
+    title_panel->SetSizer(title_sizer);
+
+    Label* static_text = new Label(this, _L("Nozzle Info"));
+    static_text->SetFont(Label::Head_13);
+    static_text->SetBackgroundColour(0xEEEEEE);
+
+    title_sizer->Add(static_text, 0, wxALIGN_CENTER | wxALL, FromDIP(5));
+
+    main_sizer->Add(title_panel, 0, wxEXPAND);
+    main_sizer->AddSpacer(10);
+
+    wxSizer* nozzle_area_sizer = new wxBoxSizer(wxHORIZONTAL);
+
+    m_table = new HotEndTable(this);
+
+    nozzle_area_sizer->Add(m_badge, 0, wxLEFT | wxRIGHT, FromDIP(20));
+    nozzle_area_sizer->Add(m_table, 0, wxRIGHT, FromDIP(10));
+
+    main_sizer->Add(nozzle_area_sizer);
+    main_sizer->AddSpacer(FromDIP(5));
+
+    SetSizer(main_sizer);
+    Layout();
+    Fit();
+    wxGetApp().UpdateDarkUIWin(this);
+}
+
+void MultiNozzleStatusTable::MarkRelatedItems(const NozzleOption& option)
+{
+    m_table->MarkRelatedItems(option);
+
+    m_badge->MarkRelatedItems(option);
+}
+
+void MultiNozzleStatusTable::UnMarkRelatedItems(const NozzleOption& option)
+{
+    m_table->UnMarkRelatedItems(option);
+
+    m_badge->UnMarkRelatedItems(option);
+}
+
+void MultiNozzleStatusTable::UpdateRackInfo(std::weak_ptr<DevNozzleRack> rack)
+{
+    if (m_table)
+        m_table->UpdateRackInfo(rack);
+    if (m_badge) {
+        auto nozzle_rack = rack.lock();
+        if (!nozzle_rack)
+            return;
+        auto nozzles_in_extruder = nozzle_rack->GetNozzleSystem()->GetExtNozzles();
+        bool has_right = false;
+        for (auto& elem : nozzles_in_extruder) {
+            auto& nozzle = elem.second;
+            int extruder_id = nozzle.AtLeftExtruder() ? 0 : 1;
+            if (nozzle.AtRightExtruder())
+                has_right = true;
+
+            NozzleVolumeType volume_type = DevNozzle::ToNozzleVolumeType(nozzle.m_nozzle_flow);
+
+            m_badge->SetExtruderInfo(extruder_id, format_diameter_to_str(nozzle.GetNozzleDiameter()), volume_type);
+        }
+        m_badge->SetExtruderValid(has_right);
+    }
+}
+
+
+Slic3r::GUI::MultiNozzleSyncDialog::MultiNozzleSyncDialog(wxWindow* parent,std::weak_ptr<DevNozzleRack> rack) : DPIDialog(parent, wxID_ANY, _L("Sync Nozzle status"),wxDefaultPosition, wxDefaultSize,wxDEFAULT_DIALOG_STYLE)
+{
+    m_nozzle_rack = rack;
+    wxSizer* main_sizer = new wxBoxSizer(wxVERTICAL);
+    SetBackgroundColour(*wxWHITE);
+
+    m_tips = new Label(this, "");
+    wxBoxSizer* label_sizer = new wxBoxSizer(wxHORIZONTAL);
+    label_sizer->Add(m_tips, 0, wxLEFT | wxRIGHT, FromDIP(25));
+    main_sizer->Add(label_sizer, 0, wxTOP | wxBOTTOM, FromDIP(15));
+
+    m_list_table = new NozzleListTable(this);
+
+    m_list_table->Bind(EVT_NOZZLE_SELECTED, [this](wxCommandEvent& evt) {
+        int idx = evt.GetInt();
+        this->OnSelectRadio(idx);
+        });
+
+    main_sizer->Add(m_list_table, 0, wxEXPAND | wxLEFT | wxRIGHT, FromDIP(25));
+
+    m_nozzle_table = new MultiNozzleStatusTable(this);
+    wxBoxSizer* table_sizer = new wxBoxSizer(wxHORIZONTAL);
+    table_sizer->Add(m_nozzle_table, 0, wxLEFT | wxRIGHT, FromDIP(25));
+    main_sizer->Add(table_sizer, 0, wxTOP | wxBOTTOM, FromDIP(15));
+
+    wxBoxSizer* button_sizer = new wxBoxSizer(wxHORIZONTAL);
+
+    m_cancel_btn = new Button(this, _L("Cancel"), "", 0, 0, wxID_OK);
+    m_confirm_btn = new Button(this, _L("Confirm"), "", 0, 0, wxID_CANCEL);
+
+    m_caution = new Label(this, _L("Caution: Mixing nozzle diameters in one print is not supported. If the selected size is only on one extruder, single-extruder printing will be enforced."));
+    m_caution->SetForegroundColour("#909090");
+    main_sizer->Add(m_caution, 0, wxLEFT | wxRIGHT, FromDIP(25));
+
+    StateColor btn_bg_green(
+        std::pair<wxColour, int>(wxColour(144, 144, 144), StateColor::Disabled),
+        std::pair<wxColour, int>(wxColour(27, 136, 68), StateColor::Pressed),
+        std::pair<wxColour, int>(wxColour(61, 203, 115), StateColor::Hovered),
+        std::pair<wxColour, int>(wxColour(0, 174, 66), StateColor::Normal)
+    );
+
+    StateColor btn_text_green(
+        std::pair<wxColour, int>(wxColour(255, 255, 254), StateColor::Normal)
+    );
+
+
+    m_confirm_btn->SetBackgroundColor(btn_bg_green);
+    m_confirm_btn->SetMinSize(wxSize(FromDIP(55), FromDIP(24)));
+    m_confirm_btn->SetCornerRadius(FromDIP(12));
+    m_confirm_btn->SetBackgroundColor(btn_bg_green);
+    m_confirm_btn->SetTextColor(btn_text_green);
+    m_confirm_btn->SetFocus();
+
+    m_cancel_btn->SetMinSize(wxSize(FromDIP(55), FromDIP(24)));
+    m_cancel_btn->SetCornerRadius(FromDIP(12));
+
+    button_sizer->AddStretchSpacer();
+    button_sizer->Add(m_cancel_btn, 0, wxALL, FromDIP(10));
+    button_sizer->Add(m_confirm_btn, 0, wxALL, FromDIP(10));
+
+    main_sizer->Add(button_sizer, 0, wxEXPAND | wxALL, FromDIP(10));
+
+    SetSizer(main_sizer);
+
+    //main_sizer->SetSizeHints(this);
+    main_sizer->Fit(this);
+
+    int table_width = m_nozzle_table->GetBestSize().GetWidth();
+    m_tips->Wrap(table_width);
+    m_tips->SetMaxSize(wxSize(table_width, -1));
+
+    m_caution->Wrap(table_width);
+    m_caution->SetMaxSize(wxSize(table_width, -1));
+
+    Layout();
+
+    m_refresh_timer = new wxTimer(this);
+    Bind(wxEVT_TIMER, &MultiNozzleSyncDialog::OnRefreshTimer, this);
+    CenterOnParent();
+    wxGetApp().UpdateDlgDarkUI(this);
+}
+
+
+void MultiNozzleSyncDialog::OnRackStatusReadingFinished(wxEvent& evt) {
+    if (!IsShown()) return;
+
+    m_refreshing = false;
+    if (m_refresh_timer)
+        m_refresh_timer->Stop();
+#if 1
+    if (!UpdateUi(m_nozzle_rack))
+        EndModal(wxID_OK);
+#else
+    if(!UpdateUoi(m_nozzle_rack)){
+        CallAfter([this]() {
+            EndModal(wxID_OK);
+            });
+    }
+#endif
+}
+
+void MultiNozzleSyncDialog::OnRefreshTimer(wxTimerEvent& evt){
+    if(!m_refreshing)
+        return;
+    auto nozzle_rack = m_nozzle_rack.lock();
+    if(!nozzle_rack)
+        return;
+
+    int reading_count = nozzle_rack->GetReadingCount();
+    int reading_idx = nozzle_rack->GetReadingIdx();
+
+    wxString tip = wxString::Format(_L("Refresh %d/%d..."), reading_idx, reading_count);
+    m_confirm_btn->SetLabel(tip);
+    m_confirm_btn->Fit();
+    if (m_confirm_btn->GetParent())
+        m_confirm_btn->GetParent()->Layout();
+
+    m_confirm_btn->Disable();
+    m_cancel_btn->Disable();
+}
+
+void MultiNozzleSyncDialog::UpdateRackInfo(std::weak_ptr<DevNozzleRack> rack)
+{
+    m_nozzle_rack = rack;
+    UpdateUi(rack);
+}
+
+void MultiNozzleSyncDialog::OnSelectRadio(int select_idx)
+{
+    if (m_nozzle_option_idx != -1)
+        m_nozzle_table->UnMarkRelatedItems(m_nozzle_option_values[m_nozzle_option_idx]);
+    m_nozzle_option_idx = select_idx;
+    m_nozzle_table->MarkRelatedItems(m_nozzle_option_values[m_nozzle_option_idx]);
+}
+
+bool MultiNozzleSyncDialog::hasMultiDiameters(const std::vector<MultiNozzleUtils::NozzleGroupInfo>& group_infos)
+{
+    if (group_infos.empty())
+        return false;
+    return !std::all_of(group_infos.begin(), group_infos.end(), [val = group_infos.front()](auto& elem) {return val.diameter == elem.diameter; });
+}
+
+
+std::vector<NozzleOption> MultiNozzleSyncDialog::GetNozzleOptions(const std::vector<MultiNozzleUtils::NozzleGroupInfo>& nozzle_groups)
+{
+    std::vector<NozzleOption> options;
+
+    std::set<std::string> diameters;
+    std::multimap<std::string, MultiNozzleUtils::NozzleGroupInfo> groups_mapped_for_diameter;
+    for (auto& nozzle_group : nozzle_groups) {
+        groups_mapped_for_diameter.insert({ nozzle_group.diameter,nozzle_group });
+    }
+
+#if ENABLE_MIX_FLOW_PRINT
+    for (auto it = groups_mapped_for_diameter.begin(); it != groups_mapped_for_diameter.end(); ) {
+        NozzleOption option;
+        const auto& diameter = it->first;
+        auto range = groups_mapped_for_diameter.equal_range(diameter);
+
+        option.diameter = diameter;
+        for (auto val_it = range.first; val_it != range.second; ++val_it) {
+            const auto& elem = val_it->second;
+            option.extruder_nozzle_stats[elem.extruder_id][elem.volume_type] += elem.nozzle_count;
+        }
+        options.emplace_back(std::move(option));
+        it = range.second;
+    }
+#else
+    for (auto it = groups_mapped_for_diameter.begin(); it != groups_mapped_for_diameter.end(); ) {
+        const auto& diameter = it->first;
+        auto range = groups_mapped_for_diameter.equal_range(diameter);
+
+        std::vector<std::pair<NozzleVolumeType, int>> left_nozzles;
+        std::vector<std::pair<NozzleVolumeType, int>> right_nozzles;
+
+        for (auto val_it = range.first; val_it != range.second; ++val_it) {
+            const auto& elem = val_it->second;
+            if (elem.extruder_id == 0)
+                left_nozzles.emplace_back(elem.volume_type, elem.nozzle_count);
+            else
+                right_nozzles.emplace_back(elem.volume_type, elem.nozzle_count);
+        }
+
+        for (const auto& left_nozzle : left_nozzles.empty() ? std::vector<std::pair<NozzleVolumeType, int>>{{}} : left_nozzles) {
+            for (const auto& right_nozzle : right_nozzles.empty() ? std::vector<std::pair<NozzleVolumeType, int>>{{}} : right_nozzles) {
+                NozzleOption option;
+                option.diameter = diameter;
+
+                if (!left_nozzles.empty()) {
+                    option.extruder_nozzle_stats[0] = { left_nozzle.first, left_nozzle.second };
+                }
+
+                if (!right_nozzles.empty()) {
+                    option.extruder_nozzle_stats[1] = { right_nozzle.first, right_nozzle.second };
+                }
+
+                options.emplace_back(std::move(option));
+            }
+        }
+
+        it = range.second;
+    }
+#endif
+    return options;
+}
+
+bool MultiNozzleSyncDialog::UpdateOptionList(std::weak_ptr<DevNozzleRack> rack, bool ignore_unknown, bool ignore_unreliable)
+{
+    const auto& nozzle_rack = rack.lock();
+    if (!nozzle_rack)
+        return true;
+    bool has_unknown = nozzle_rack->HasUnknownNozzles() && !ignore_unknown;
+    bool has_unreliable = nozzle_rack->HasUnreliableNozzles() && !ignore_unreliable;
+
+    if (has_unknown || has_unreliable) {
+        m_list_table->Hide();
+        return true;
+    }
+
+    m_list_table->Show();
+
+    m_nozzle_option_values.clear();
+
+    auto options = GetNozzleOptions(nozzle_rack->GetNozzleSystem()->GetNozzleGroups());
+
+    int recommend_idx = std::max_element(options.begin(), options.end(), [](const NozzleOption& opt1, const NozzleOption& opt2) {
+        int count1 = 0, count2 = 0;
+        for (auto elem : opt1.extruder_nozzle_stats) {
+            for (auto& stats : elem.second)
+                count1 += stats.second;
+        }
+        for (auto elem : opt2.extruder_nozzle_stats) {
+            for (auto& stats : elem.second)
+                count2 += stats.second;
+        }
+        return count1 < count2;
+        }) - options.begin();
+
+    m_nozzle_option_values = options;
+    OnSelectRadio(recommend_idx);
+    m_list_table->SetOptions(options,recommend_idx);
+
+        if (!has_unknown && !has_unreliable && options.size() == 1) {
+            return false;
+        }
+        return true;
+}
+
+void MultiNozzleSyncDialog::UpdateTip(std::weak_ptr<DevNozzleRack> rack, bool ignore_unknown, bool ignore_unreliable)
+{
+    const auto& nozzle_rack = rack.lock();
+    if (!nozzle_rack)
+        return;
+
+    bool has_unknown = nozzle_rack->HasUnknownNozzles() && !ignore_unknown;
+    bool has_unreliable = nozzle_rack->HasUnreliableNozzles() && !ignore_unreliable;
+
+    if (has_unknown && has_unreliable) {
+        m_tips->SetLabel(_L("Unknown nozzle detected. Refresh to update info (unrefreshed nozzles will be excluded during slicing). Verify nozzle diameter & flow rate against displayed values."));
+        m_caution->Hide();
+    }
+    else if (has_unknown) {
+        m_tips->SetLabel(_L("Unknown nozzle detected. Refresh to update (unrefreshed nozzles will be skipped in slicing)."));
+        m_caution->Hide();
+    }
+    else if (has_unreliable) {
+        m_tips->SetLabel(_L("Please confirm whether the required nozzle diameter and flow rate match the currently displayed values."));
+        m_caution->Hide();
+    }
+    else {
+        m_tips->SetLabel(_L("Your printer has different nozzles installed. Please select a nozzle for this print."));
+        m_caution->Show();
+    }
+}
+
+int MultiNozzleSyncDialog::ShowModal()
+{
+    bool res = UpdateUi(m_nozzle_rack);
+    if (!res)
+        return wxID_OK;
+
+    return DPIDialog::ShowModal();
+
+}
+
+MultiNozzleSyncDialog::~MultiNozzleSyncDialog()
+{
+    if (auto rack = m_nozzle_rack.lock()) {
+        rack->Unbind(DEV_RACK_EVENT_READING_FINISHED, &MultiNozzleSyncDialog::OnRackStatusReadingFinished, this);
+    }
+    if (m_refresh_timer)
+        m_refresh_timer->Stop();
+}
+
+void MultiNozzleSyncDialog::UpdateButton(std::weak_ptr<DevNozzleRack> rack, bool ignore_unknown, bool ignore_unreliable)
+{
+    const auto& nozzle_rack = rack.lock();
+    if (!nozzle_rack)
+        return;
+
+    if (m_refreshing)
+        return;
+
+    bool has_unknown = nozzle_rack->HasUnknownNozzles() && !ignore_unknown;
+    bool has_unreliable = nozzle_rack->HasUnreliableNozzles() && !ignore_unreliable;
+
+    auto refresh_cmd = [rack, this]() {
+        auto nozzle_rack = m_nozzle_rack.lock();
+        if (!nozzle_rack)
+            return;
+        nozzle_rack->CtrlRackReadAll();
+        m_refreshing = true;
+        if (m_refresh_timer)
+            m_refresh_timer->Start(500);
+        nozzle_rack->Bind(DEV_RACK_EVENT_READING_FINISHED, &MultiNozzleSyncDialog::OnRackStatusReadingFinished, this);
+        };
+
+    auto trust_cmd = [rack, this]() {
+        auto nozzle_rack = rack.lock();
+        if (!nozzle_rack)
+            return;
+        nozzle_rack->CtrlRackConfirmAll();
+        UpdateUi(rack, true, false);
+    };
+
+    auto ignore_opt = [rack,this]() {
+        if (!UpdateUi(rack, true, true))
+            EndModal(wxID_OK);
+        };
+
+    m_cancel_btn->Enable();
+    m_confirm_btn->Enable();
+
+    if (has_unknown && has_unreliable) {
+        m_cancel_btn->Show();
+        m_confirm_btn->Show();
+
+        m_cancel_btn->SetLabel(_L("Ignore"));
+        m_confirm_btn->SetLabel(_L("Refresh"));
+
+        m_cancel_btn->Bind(wxEVT_LEFT_DOWN, [this, rack, ignore_opt](auto& e) {ignore_opt(); });
+        m_confirm_btn->Bind(wxEVT_LEFT_DOWN, [this, rack, refresh_cmd](auto& e) {refresh_cmd(); });
+    }
+    else if (has_unknown) {
+        m_cancel_btn->Show();
+        m_confirm_btn->Show();
+
+        m_cancel_btn->SetLabel(_L("Ignore"));
+        m_confirm_btn->SetLabel(_L("Refresh"));
+
+        m_cancel_btn->Bind(wxEVT_LEFT_DOWN, [this, rack, ignore_opt](auto& e) {ignore_opt(); });
+        m_confirm_btn->Bind(wxEVT_LEFT_DOWN, [this, rack, refresh_cmd](auto& e) {refresh_cmd(); });
+    }
+    else if (has_unreliable) {
+        m_cancel_btn->Show();
+        m_confirm_btn->Show();
+
+        m_cancel_btn->SetLabel(_L("Refresh"));
+        m_confirm_btn->SetLabel(_L("Confirm"));
+
+        m_cancel_btn->Bind(wxEVT_LEFT_DOWN, [this, rack, refresh_cmd](auto& e) {refresh_cmd(); });
+        m_confirm_btn->Bind(wxEVT_LEFT_DOWN, [this, rack, trust_cmd](auto& e) {trust_cmd(); });
+
+    }
+    else {
+        m_cancel_btn->Hide();
+        m_confirm_btn->Show();
+        m_confirm_btn->SetLabel(_L("OK"));
+        m_confirm_btn->Bind(wxEVT_LEFT_DOWN, [this](auto& e) {EndModal(wxID_OK); });
+    }
+
+}
+
+bool MultiNozzleSyncDialog::UpdateUi(std::weak_ptr<DevNozzleRack> rack, bool ignore_unknown, bool ignore_unreliable)
+{
+    m_nozzle_table->UpdateRackInfo(rack);
+    bool res = UpdateOptionList(rack, ignore_unknown, ignore_unreliable);
+    if (!res)
+        return false;
+
+    UpdateTip(rack, ignore_unknown, ignore_unreliable);
+    UpdateButton(rack, ignore_unknown, ignore_unreliable);
+
+    Layout();
+
+    int table_width = m_nozzle_table->GetBestSize().GetWidth();
+    m_tips->Wrap(table_width);
+    m_tips->SetMaxSize(wxSize(table_width, -1));
+    m_caution->Wrap(table_width);
+    m_caution->SetMaxSize(wxSize(table_width, -1));
+    Fit();
+    return true;
+}
+
+
+std::optional<NozzleOption> tryPopUpMultiNozzleDialog(MachineObject* obj)
+{
+    if (!obj)
+        return std::nullopt;
+    auto rack = obj->GetNozzleSystem()->GetNozzleRack();
+    if (!rack || !rack->IsSupported())
+        return std::nullopt;
+    MultiNozzleSyncDialog dialog(wxGetApp().plater_,rack);
+
+    bool has_unreliable = rack->HasUnreliableNozzles();
+    bool has_unknown = rack->HasUnknownNozzles();
+
+    auto config = wxGetApp().preset_bundle->printers.get_edited_preset().config;
+
+    if (dialog.ShowModal() == wxID_OK) {
+        auto selected_option = dialog.GetSelectedOption();
+        if (!selected_option)
+            return std::nullopt;
+        auto& preset_bundle = GUI::wxGetApp().preset_bundle;
+        auto& project_config = preset_bundle->project_config;
+
+        ConfigOptionEnumsGeneric* nozzle_volume_type_opt = project_config.option<ConfigOptionEnumsGeneric>("nozzle_volume_type");
+
+        // write to preset bundle config
+        for (int extruder_id = 0; extruder_id < 2; ++extruder_id) {
+            NozzleVolumeType volume_type;
+            int nozzle_count;
+            bool clear_all = true;
+            if (!selected_option->extruder_nozzle_stats.count(extruder_id)) {
+                nozzle_count = 0;
+                // Reset the concrete volume types (Standard/High Flow); Hybrid stays a hidden match-any sentinel.
+                // TPU High Flow is a concrete variant that exists only on 0.4/0.6 nozzles, so reset it too, but
+                // only there (same guard that skips High Flow on 0.2).
+                std::vector<NozzleVolumeType> reset_types{nvtStandard, nvtHighFlow};
+                if (extruder_supports_tpu_high_flow(preset_bundle, extruder_id))
+                    reset_types.push_back(nvtTPUHighFlow);
+                for (NozzleVolumeType vt : reset_types) {
+                    volume_type = vt;
+                    setExtruderNozzleCount(preset_bundle, extruder_id, volume_type, nozzle_count, clear_all);
+                    clear_all = false;
+                }
+            }
+            else {
+                for (auto& stat : selected_option->extruder_nozzle_stats[extruder_id]) {
+                    volume_type = stat.first;
+                    nozzle_count = stat.second;
+                    setExtruderNozzleCount(preset_bundle, extruder_id, volume_type, nozzle_count, clear_all);
+                    clear_all = false;
+                }
+            }
+        }
+        // Orca: there is no ExtruderNozzleStat runtime object, so there is no machine/user data-source flag to mark
+        // here; nozzle stats persist directly into the printer preset's `extruder_nozzle_stats` config key via
+        // setExtruderNozzleCount.
+        return selected_option;
+    }
+
+    return std::nullopt;
+}
+
+}} // namespace Slic3r::GUI
diff --git a/src/slic3r/GUI/Widgets/MultiNozzleSync.hpp b/src/slic3r/GUI/Widgets/MultiNozzleSync.hpp
new file mode 100644
index 0000000000..7da90f1413
--- /dev/null
+++ b/src/slic3r/GUI/Widgets/MultiNozzleSync.hpp
@@ -0,0 +1,239 @@
+#ifndef slic3r_GUI_MultiNozzleSync_hpp_
+#define slic3r_GUI_MultiNozzleSync_hpp_
+
+// Multi-nozzle GUI.
+//
+// Two surfaces live here:
+//  - The DEVICE-INDEPENDENT "manual nozzle count" surface (ManualNozzleCountDialog + helpers): lets the
+//    user declare, per extruder, how many physical nozzles of each volume type a multi-nozzle (H2C)
+//    extruder carries. Persisted into the printer preset's `extruder_nozzle_stats` config key, which the
+//    multi-nozzle slicer already consumes (ToolOrdering::build_multi_nozzle_group_result).
+//  - The DEVICE-SYNC surface (MultiNozzleSyncDialog / HotEndTable / NozzleListTable /
+//    tryPopUpMultiNozzleDialog): reads the live nozzle rack from the connected machine via
+//    DevNozzleRack / wgtDeviceNozzleRackNozzleItem and lets the user pick a nozzle option to slice with.
+//    Popped from the sidebar "sync machine" button when the selected printer is an H2C.
+//
+// Everything here is inert for existing printers: the manual entry points are gated on the printer having
+// any extruder with `extruder_max_nozzle_count > 1` (no shipping single-nozzle/dual-extruder profile sets
+// it), and the device-sync path only runs for a connected machine whose rack reports as supported.
+
+#include "../GUI_Utils.hpp"
+#include "libslic3r/PrintConfig.hpp"
+#include "libslic3r/MultiNozzleUtils.hpp"
+#include "slic3r/GUI/DeviceCore/DevNozzleRack.h"
+#include "slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.h"
+
+#include <wx/panel.h>
+#include <wx/webview.h>
+
+#include <memory>
+#include <optional>
+#include <unordered_map>
+#include <vector>
+
+class wxChoice;
+class wxStaticText;
+class wxStaticBitmap;
+class Button; // global widget (src/slic3r/GUI/Widgets/Button.hpp), not in the Slic3r::GUI namespace
+class Label;  // global widget (src/slic3r/GUI/Widgets/Label.hpp)
+class StaticBox;
+
+namespace Slic3r {
+class PresetBundle;
+class MachineObject;
+
+namespace GUI {
+
+#define ENABLE_MIX_FLOW_PRINT 1
+
+#if ENABLE_MIX_FLOW_PRINT
+struct NozzleOption
+{
+    std::string diameter;
+    std::unordered_map<int, std::unordered_map<NozzleVolumeType, int>> extruder_nozzle_stats;
+};
+#else
+struct NozzleOption
+{
+    std::string diameter;
+    std::unordered_map<int, std::pair<NozzleVolumeType, int>> extruder_nozzle_stats;
+};
+#endif
+
+// Dialog to manually set the per-volume-type physical nozzle count of one multi-nozzle extruder.
+class ManualNozzleCountDialog : public DPIDialog
+{
+public:
+    ManualNozzleCountDialog(wxWindow *parent, NozzleVolumeType volume_type, int standard_count, int highflow_count, int max_nozzle_count, bool force_no_zero);
+    ~ManualNozzleCountDialog() override = default;
+    void on_dpi_changed(const wxRect &suggested_rect) override {}
+    int  GetNozzleCount(NozzleVolumeType volume_type) const;
+
+private:
+    wxChoice        *m_standard_choice{nullptr};
+    wxChoice        *m_highflow_choice{nullptr};
+    Button          *m_confirm_btn{nullptr};
+    wxStaticText    *m_error_label{nullptr};
+};
+
+class ExtruderBadge : public wxPanel
+{
+public:
+    ExtruderBadge(wxWindow* parent);
+    void SetExtruderInfo(int extruder_id, const std::string& label, const NozzleVolumeType& flow);
+    void UnMarkRelatedItems(const NozzleOption& option);
+    void MarkRelatedItems(const NozzleOption& option);
+    void SetExtruderValid(bool right_on);
+private:
+    void SetExtruderStatus(bool left_selected, bool right_selected);
+
+    bool m_right_on{ true };
+    wxStaticBitmap* badget;
+    Label* left;
+    Label* right;
+    Label* left_diameter_desp;
+    Label* right_diameter_desp;
+    Label* left_flow_desp;
+    Label* right_flow_desp;
+
+    std::vector<std::string> m_diameter_list;
+    std::vector<NozzleVolumeType> m_volume_type_list;
+};
+
+class HotEndTable : public wxPanel
+{
+public:
+    HotEndTable(wxWindow* parent);
+    void UpdateRackInfo(std::weak_ptr<DevNozzleRack> rack);
+    void MarkRelatedItems(const NozzleOption& option);
+    void UnMarkRelatedItems(const NozzleOption& option);
+private:
+    StaticBox* CreateNozzleBox(const std::vector<int>& nozzle_indices);
+    void UpdateNozzleItems(const std::unordered_map<int, wgtDeviceNozzleRackNozzleItem*>& nozzle_items,
+        std::shared_ptr<DevNozzleRack> nozzle_rack);
+
+private:
+    struct HotEndAttr {
+        std::string diameter;
+        int extruder_id;
+        NozzleVolumeType volume_type;
+    };
+
+    std::vector<int> FilterHotEnds(const NozzleOption& option);
+
+private:
+    StaticBox* m_arow_nozzle_box{ nullptr };
+    StaticBox* m_brow_nozzle_box{ nullptr };
+    std::unordered_map<int, wgtDeviceNozzleRackNozzleItem*> m_nozzle_items;
+    std::weak_ptr<DevNozzleRack> m_nozzle_rack;
+    void OnPaint(wxPaintEvent& event);
+};
+
+
+wxDECLARE_EVENT(EVT_NOZZLE_SELECTED, wxCommandEvent);
+
+class NozzleListTable : public wxPanel
+{
+public:
+    NozzleListTable(wxWindow* parent);
+    int GetSelectIdx();
+    void SetOptions(const std::vector<NozzleOption>& options,int default_select);
+private:
+    wxString BuildTableObjStr();
+    wxString BuildTextObjStr();
+    std::vector<NozzleOption> m_nozzle_options;
+
+    void SendSelectionChangedEvent();
+
+    wxWebView* m_web_view;
+
+    int m_selected_idx;
+};
+
+class MultiNozzleStatusTable : public wxPanel
+{
+public:
+    MultiNozzleStatusTable(wxWindow* parent);
+    void UpdateRackInfo(std::weak_ptr<DevNozzleRack> rack);
+    void MarkRelatedItems(const NozzleOption& option);
+    void UnMarkRelatedItems(const NozzleOption& option);
+private:
+    ExtruderBadge* m_badge;
+    HotEndTable* m_table;
+};
+
+
+class MultiNozzleSyncDialog : public DPIDialog
+{
+public:
+    MultiNozzleSyncDialog(wxWindow* parent, std::weak_ptr<DevNozzleRack> rack);
+    virtual void on_dpi_changed(const wxRect& suggested_rect) {};
+    std::vector<NozzleOption> GetNozzleOptions(const std::vector<MultiNozzleUtils::NozzleGroupInfo>& group_infos);
+
+    std::optional<NozzleOption> GetSelectedOption() {
+        if (m_nozzle_option_idx < 0 || m_nozzle_option_idx >= m_nozzle_option_values.size())
+            return std::nullopt;
+        return m_nozzle_option_values[m_nozzle_option_idx];
+    }
+
+    int ShowModal() override;
+    ~MultiNozzleSyncDialog() override;
+private:
+    void UpdateRackInfo(std::weak_ptr<DevNozzleRack> rack);
+
+    bool hasMultiDiameters(const std::vector<MultiNozzleUtils::NozzleGroupInfo>& group_infos);
+    void OnSelectRadio(int select_idx);
+
+    bool UpdateUi(std::weak_ptr<DevNozzleRack> rack, bool ignore_unknown=false, bool ignore_unreliable=false);
+
+    bool UpdateOptionList(std::weak_ptr<DevNozzleRack> rack, bool ignore_unknown, bool ignore_unreliable);
+    void UpdateTip(std::weak_ptr<DevNozzleRack> rack, bool ignore_unknown, bool ignore_unreliable);
+    void UpdateButton(std::weak_ptr<DevNozzleRack> rack, bool ignore_unknown, bool ignore_unreliable);
+    void OnRackStatusReadingFinished(wxEvent& evt);
+    void OnRefreshTimer(wxTimerEvent& event);
+
+private:
+    MultiNozzleStatusTable* m_nozzle_table;
+    NozzleListTable* m_list_table;
+    std::vector<NozzleOption> m_nozzle_option_values;
+    int m_nozzle_option_idx{ -1 };
+    bool m_refreshing{ false };
+
+    std::weak_ptr<DevNozzleRack> m_nozzle_rack;
+    Label* m_tips;
+    Label* m_caution;
+
+    wxTimer* m_refresh_timer {nullptr};
+    size_t m_rack_event_token;
+    Button* m_cancel_btn;
+    Button* m_confirm_btn;
+};
+
+
+// Entry point for the sidebar "sync machine" button: pops MultiNozzleSyncDialog for a connected H2C and
+// returns the chosen nozzle option (nullopt if the machine has no supported rack or the user cancels).
+std::optional<NozzleOption> tryPopUpMultiNozzleDialog(MachineObject* obj);
+
+// Persist one extruder's per-volume-type nozzle count into the edited printer preset's `extruder_nozzle_stats`
+// config key (the value the multi-nozzle slicer reads). When clear_all is true, the extruder's other volume-type
+// counts are reset first.
+void setExtruderNozzleCount(PresetBundle *preset_bundle, int extruder_id, NozzleVolumeType type, int nozzle_count, bool clear_all);
+
+// Refresh the sidebar nozzle-count display for one extruder. Deferred wiring point: Orca's sidebar ExtruderGroup has
+// no nozzle-count widget yet, so the multi-nozzle sidebar UI is not wired up.
+void updateNozzleCountDisplay(PresetBundle *preset_bundle, int extruder_id, NozzleVolumeType volume_type);
+
+// True when a nozzle of this diameter can carry the "Direct Drive TPU High Flow" variant. That variant
+// exists on the 0.4 and 0.6 nozzle H2D/H2D Pro leaves (not 0.2/0.8), so this is the single source of truth
+// for the diameter set — the counterpart of the High-Flow-skip-for-0.2 guard.
+bool nozzle_diameter_supports_tpu_high_flow(double nozzle_diameter);
+// Same predicate resolved from the edited printer preset's nozzle_diameter for one extruder. False when unknown.
+bool extruder_supports_tpu_high_flow(PresetBundle *preset_bundle, int extruder_id);
+
+// Entry point: pop the ManualNozzleCountDialog for one extruder of a multi-nozzle printer and persist the result.
+// No-op unless the selected printer has an extruder with extruder_max_nozzle_count > 1.
+void manuallySetNozzleCount(int extruder_id);
+
+}} // namespace Slic3r::GUI
+
+#endif // slic3r_GUI_MultiNozzleSync_hpp_
diff --git a/src/slic3r/Utils/CalibUtils.cpp b/src/slic3r/Utils/CalibUtils.cpp
index 8e7de91318..e7d16ffef9 100644
--- a/src/slic3r/Utils/CalibUtils.cpp
+++ b/src/slic3r/Utils/CalibUtils.cpp
@@ -94,6 +94,10 @@ wxString get_nozzle_volume_type_name(NozzleVolumeType type)
         return _L("Standard");
     } else if (NozzleVolumeType::nvtHighFlow == type) {
         return _L("High Flow");
+    } else if (NozzleVolumeType::nvtHybrid == type) {
+        return _L("Hybrid");
+    } else if (NozzleVolumeType::nvtTPUHighFlow == type) {
+        return _L("TPU High Flow");
     }
     return wxString();
 }