diff --git a/lib/Slic3r/GUI/MainFrame.pm b/lib/Slic3r/GUI/MainFrame.pm
index 1465c1215..6cf80f24a 100644
--- a/lib/Slic3r/GUI/MainFrame.pm
+++ b/lib/Slic3r/GUI/MainFrame.pm
@@ -31,6 +31,8 @@ our $OBJECT_SELECTION_CHANGED_EVENT = Wx::NewEventType;
 our $OBJECT_SETTINGS_CHANGED_EVENT = Wx::NewEventType;
 # 5) To inform about a remove of object 
 our $OBJECT_REMOVE_EVENT = Wx::NewEventType;
+# 6) To inform about a update of the scene 
+our $UPDATE_SCENE_EVENT = Wx::NewEventType;
 
 sub new {
     my ($class, %params) = @_;
@@ -125,6 +127,7 @@ sub _init_tabpanel {
             event_object_selection_changed   => $OBJECT_SELECTION_CHANGED_EVENT,
             event_object_settings_changed    => $OBJECT_SETTINGS_CHANGED_EVENT,
             event_remove_object              => $OBJECT_REMOVE_EVENT,
+            event_update_scene               => $UPDATE_SCENE_EVENT,
             ), L("Plater"));
         if (!$self->{no_controller}) {
             $panel->AddPage($self->{controller} = Slic3r::GUI::Controller->new($panel), L("Controller"));
@@ -191,7 +194,7 @@ sub _init_tabpanel {
         $self->{plater}->item_changed_selection($obj_idx);
     });
 
-    # The following event is emited by the C++ Tab implementation on object settings change.
+    # The following event is emited by the C++ GUI implementation on object settings change.
     EVT_COMMAND($self, -1, $OBJECT_SETTINGS_CHANGED_EVENT, sub {
         my ($self, $event) = @_;
 
@@ -201,11 +204,17 @@ sub _init_tabpanel {
         $self->{plater}->changed_object_settings($obj_idx, $parts_changed, $part_settings_changed);
     });
 
-    # The following event is emited by the C++ Tab implementation on object settings change.
+    # The following event is emited by the C++ GUI implementation on object remove.
     EVT_COMMAND($self, -1, $OBJECT_REMOVE_EVENT, sub {
         my ($self, $event) = @_;
         $self->{plater}->remove();
     });
+
+    # The following event is emited by the C++ GUI implementation on extruder change for object.
+    EVT_COMMAND($self, -1, $UPDATE_SCENE_EVENT, sub {
+        my ($self, $event) = @_;
+        $self->{plater}->update();
+    });
         
 
     Slic3r::GUI::create_preset_tabs($self->{no_controller}, $VALUE_CHANGE_EVENT, $PRESETS_CHANGED_EVENT);
diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index ac54e67d8..ac4b9f78f 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -58,6 +58,7 @@ sub new {
     $self->{event_object_selection_changed} = $params{event_object_selection_changed};
     $self->{event_object_settings_changed} = $params{event_object_settings_changed};
     $self->{event_remove_object} = $params{event_remove_object};
+    $self->{event_update_scene} = $params{event_update_scene};
 
     # C++ Slic3r::Model with Perl extensions in Slic3r/Model.pm
     $self->{model} = Slic3r::Model->new;
@@ -452,7 +453,8 @@ sub new {
                                             $self->{model},
                                             $self->{event_object_selection_changed},
                                             $self->{event_object_settings_changed},
-                                            $self->{event_remove_object});
+                                            $self->{event_remove_object},
+                                            $self->{event_update_scene});
 #        if ($expert_mode_part_sizer->IsShown(2)==1) 
 #        { 
 #           $expert_mode_part_sizer->Layout;
diff --git a/resources/icons/erase.png b/resources/icons/erase.png
new file mode 100644
index 000000000..4c4cfd755
Binary files /dev/null and b/resources/icons/erase.png differ
diff --git a/resources/icons/exclamation_mark_.png b/resources/icons/exclamation_mark_.png
new file mode 100644
index 000000000..886baf227
Binary files /dev/null and b/resources/icons/exclamation_mark_.png differ
diff --git a/xs/src/slic3r/GUI/GUI.cpp b/xs/src/slic3r/GUI/GUI.cpp
index 72efd7f29..cef9d95ed 100644
--- a/xs/src/slic3r/GUI/GUI.cpp
+++ b/xs/src/slic3r/GUI/GUI.cpp
@@ -896,11 +896,13 @@ void add_expert_mode_part(	wxWindow* parent, wxBoxSizer* sizer,
 							Model &model,
 							int event_object_selection_changed,
 							int event_object_settings_changed,
-							int event_remove_object)
+							int event_remove_object, 
+							int event_update_scene)
 {
 	set_event_object_selection_changed(event_object_selection_changed);
 	set_event_object_settings_changed(event_object_settings_changed);
 	set_event_remove_object(event_remove_object);
+	set_event_update_scene(event_update_scene);
 	set_objects_from_model(model);
 	init_mesh_icons();
 
diff --git a/xs/src/slic3r/GUI/GUI.hpp b/xs/src/slic3r/GUI/GUI.hpp
index 8199a1349..7b9d3c398 100644
--- a/xs/src/slic3r/GUI/GUI.hpp
+++ b/xs/src/slic3r/GUI/GUI.hpp
@@ -191,7 +191,8 @@ void add_expert_mode_part(	wxWindow* parent, wxBoxSizer* sizer,
 							Model &model,
 							int event_object_selection_changed,
 							int event_object_settings_changed,
-							int event_remove_object);
+							int event_remove_object, 
+							int event_update_scene);
 void add_frequently_changed_parameters(wxWindow* parent, wxBoxSizer* sizer, wxFlexGridSizer* preset_sizer);
 // Update view mode according to selected menu 
 void update_mode();
diff --git a/xs/src/slic3r/GUI/GUI_ObjectParts.cpp b/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
index 252dcec26..705d72643 100644
--- a/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
+++ b/xs/src/slic3r/GUI/GUI_ObjectParts.cpp
@@ -51,6 +51,7 @@ std::vector <std::shared_ptr<ConfigOptionsGroup>> m_og_settings;
 int			m_event_object_selection_changed = 0;
 int			m_event_object_settings_changed = 0;
 int			m_event_remove_object = 0;
+int			m_event_update_scene = 0;
 
 bool m_parts_changed = false;
 bool m_part_settings_changed = false;
@@ -116,6 +117,9 @@ void set_event_object_settings_changed(const int& event){
 void set_event_remove_object(const int& event){
 	m_event_remove_object = event;
 }
+void set_event_update_scene(const int& event){
+	m_event_update_scene = event;
+}
 
 void set_objects_from_model(Model &model) {
 	m_objects = &(model.objects);
@@ -126,7 +130,7 @@ void init_mesh_icons(){
 	m_icon_solidmesh = wxIcon(Slic3r::GUI::from_u8(Slic3r::var("object.png")), wxBITMAP_TYPE_PNG);//(Slic3r::var("package.png")), wxBITMAP_TYPE_PNG);
 
 	// init icon for manifold warning
-	m_icon_manifold_warning = wxIcon(Slic3r::GUI::from_u8(Slic3r::var("error.png")), wxBITMAP_TYPE_PNG);
+	m_icon_manifold_warning = wxIcon(Slic3r::GUI::from_u8(Slic3r::var("exclamation_mark_.png")), wxBITMAP_TYPE_PNG);//(Slic3r::var("error.png")), wxBITMAP_TYPE_PNG);
 
 	// init bitmap for "Add Settings" context menu
 	m_bmp_cog = wxBitmap(Slic3r::GUI::from_u8(Slic3r::var("cog.png")), wxBITMAP_TYPE_PNG);
@@ -208,20 +212,19 @@ wxBoxSizer* content_objects_list(wxWindow *win)
 			event.Skip();
 	});
 
-	m_objects_ctrl->Bind(wxEVT_DATAVIEW_ITEM_VALUE_CHANGED, [](wxDataViewEvent& event)
+	m_objects_ctrl->Bind(wxEVT_CHOICE, [](wxCommandEvent& event)
 	{
-		if (event.GetColumn() == 3)
-		{
-			if (!*m_config)
-				return;
-			wxVariant variant;
-			m_objects_model->GetValue(variant, event.GetItem(), 3);
-			auto str = variant.GetString();
-			int extruder = str.size() > 1 ? 0 : atoi(str.c_str());
+		if (!*m_config)
+			return;
+		auto config = m_config;
 
-// 			if ((*m_config)->has("extruder"))
-			auto config = m_config;
-			(*m_config)->set_key_value("extruder", new ConfigOptionInt(extruder));			
+		wxString str = event.GetString();
+		int extruder = str.size() > 1 ? 0 : atoi(str.c_str());
+		(*m_config)->set_key_value("extruder", new ConfigOptionInt(extruder));
+
+		if (m_event_update_scene > 0) {
+			wxCommandEvent e(m_event_update_scene);
+			get_main_frame()->ProcessWindowEvent(e);
 		}
 	});
 
@@ -666,7 +669,7 @@ void update_settings_list()
 // The issue apparently manifests when Show()ing a window with overlay scrollbars while the UI is frozen. For this reason,
 // we will Thaw the UI prematurely on Linux. This means destroing the no_updates object prematurely.
 #ifdef __linux__	
-	std::unique_ptr<wxWindowUpdateLocker> no_updates(new wxWindowUpdateLocker(this));
+	std::unique_ptr<wxWindowUpdateLocker> no_updates(new wxWindowUpdateLocker(parent));
 #else
 	wxWindowUpdateLocker noUpdates(parent);
 #endif
diff --git a/xs/src/slic3r/GUI/GUI_ObjectParts.hpp b/xs/src/slic3r/GUI/GUI_ObjectParts.hpp
index 4f1c15e3a..aaeff7a43 100644
--- a/xs/src/slic3r/GUI/GUI_ObjectParts.hpp
+++ b/xs/src/slic3r/GUI/GUI_ObjectParts.hpp
@@ -74,6 +74,7 @@ void init_mesh_icons();
 void set_event_object_selection_changed(const int& event);
 void set_event_object_settings_changed(const int& event); 
 void set_event_remove_object(const int& event);
+void set_event_update_scene(const int& event);
 void set_objects_from_model(Model &model);
 
 bool is_parts_changed();
diff --git a/xs/xsp/GUI.xsp b/xs/xsp/GUI.xsp
index 98d3169bd..8ad8c8184 100644
--- a/xs/xsp/GUI.xsp
+++ b/xs/xsp/GUI.xsp
@@ -91,13 +91,15 @@ void add_expert_mode_part(  SV *ui_parent, SV *ui_sizer,
                             Model *model,
                             int event_object_selection_changed,
                             int event_object_settings_changed,
-                            int event_remove_object)
+                            int event_remove_object, 
+                            int event_update_scene)
     %code%{ Slic3r::GUI::add_expert_mode_part(  (wxWindow*)wxPli_sv_2_object(aTHX_ ui_parent, "Wx::Window"),
                                                 (wxBoxSizer*)wxPli_sv_2_object(aTHX_ ui_sizer, "Wx::BoxSizer"), 
                                                 *model,  
                                                 event_object_selection_changed,
                                                 event_object_settings_changed,
-                                                event_remove_object); %};
+                                                event_remove_object, 
+                                                event_update_scene); %};
 
 void set_objects_from_perl( SV *ui_parent, 
                             SV *frequently_changed_parameters_sizer,