diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index a3f381e5c..7f0dbedb0 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -949,6 +949,8 @@ sub increase {
         $self->{print}->objects->[$obj_idx]->add_copy($instance->offset);
     }
     $self->{list}->SetItem($obj_idx, 1, $model_object->instances_count);
+    # Set conut of object on c++ side
+    Slic3r::GUI::set_object_count($obj_idx, $model_object->instances_count);
     
     # only autoarrange if user has autocentering enabled
     $self->stop_background_process;
@@ -975,6 +977,8 @@ sub decrease {
             $self->{print}->objects->[$obj_idx]->delete_last_copy;
         }
         $self->{list}->SetItem($obj_idx, 1, $model_object->instances_count);
+        # Set conut of object on c++ side
+        Slic3r::GUI::set_object_count($obj_idx, $model_object->instances_count);
     } elsif (defined $copies_asked) {
         # The "decrease" came from the "set number of copies" dialog.
         $self->remove;
@@ -1168,6 +1172,8 @@ sub changescale {
         }
     
         $self->{list}->SetItem($obj_idx, 2, "$scale%");
+        # Set object scale on c++ side
+        Slic3r::GUI::set_object_scale($obj_idx, $scale);
         $scale /= 100;  # turn percent into factor
         
         my $variation = $scale / $model_instance->scaling_factor;
@@ -2096,6 +2102,9 @@ sub select_object {
         $self->{list}->Select($o, 0);
         $PreventListEvents = 0;
     }
+
+    # Unselect all objects in the list on c++ side
+    Slic3r::GUI::unselect_objects();
     
     if (defined $obj_idx) {
         $self->{objects}->[$obj_idx]->selected(1);
@@ -2105,6 +2114,8 @@ sub select_object {
         $PreventListEvents = 1;
         $self->{list}->Select($obj_idx, 1);
         $PreventListEvents = 0;
+        # Select current object in the list on c++ side
+        Slic3r::GUI::select_current_object($obj_idx);
     } else {
         # TODO: deselect all in list
     }
diff --git a/xs/src/slic3r/GUI/GUI.cpp b/xs/src/slic3r/GUI/GUI.cpp
index b0a7751a5..9179710fd 100644
--- a/xs/src/slic3r/GUI/GUI.cpp
+++ b/xs/src/slic3r/GUI/GUI.cpp
@@ -1071,6 +1071,28 @@ void delete_all_objects_from_list()
 	m_collpane_settings->Show(false);
 }
 
+void set_object_count(int idx, int count)
+{
+	m_objects_model->SetValue(wxString::Format("%d", count), idx, 1);
+	m_objects_ctrl->Refresh();
+}
+
+void set_object_scale(int idx, int scale)
+{
+	m_objects_model->SetValue(wxString::Format("%d%%", scale), idx, 2);
+	m_objects_ctrl->Refresh();
+}
+
+void unselect_objects()
+{
+	m_objects_ctrl->UnselectAll();
+}
+
+void select_current_object(int idx)
+{
+	m_objects_ctrl->Select(m_objects_model->GetItemById(idx));
+}
+
 void add_expert_mode_part(wxWindow* parent, wxBoxSizer* sizer)
 {
 	wxWindowUpdateLocker noUpdates(parent);
diff --git a/xs/src/slic3r/GUI/GUI.hpp b/xs/src/slic3r/GUI/GUI.hpp
index 293183e7d..6cb8ac1f0 100644
--- a/xs/src/slic3r/GUI/GUI.hpp
+++ b/xs/src/slic3r/GUI/GUI.hpp
@@ -181,6 +181,14 @@ void add_object_to_list(const std::string &name, int instances_count=1, int scal
 void delete_object_from_list();
 // Delete all objects from the list
 void delete_all_objects_from_list();
+// Set count of object on c++ side
+void set_object_count(int idx, int count);
+// Set object scale on c++ side
+void set_object_scale(int idx, int scale);
+// Unselect all objects in the list on c++ side
+void unselect_objects();
+// Select current object in the list on c++ side
+void select_current_object(int idx);
 
 void add_expert_mode_part(wxWindow* parent, wxBoxSizer* sizer);
 void add_frequently_changed_parameters(wxWindow* parent, wxBoxSizer* sizer, wxFlexGridSizer* preset_sizer);
diff --git a/xs/src/slic3r/GUI/wxExtensions.cpp b/xs/src/slic3r/GUI/wxExtensions.cpp
index 662369e05..351c631db 100644
--- a/xs/src/slic3r/GUI/wxExtensions.cpp
+++ b/xs/src/slic3r/GUI/wxExtensions.cpp
@@ -505,22 +505,7 @@ bool MyObjectTreeModel::SetValue(const wxVariant &variant, const wxDataViewItem
 	wxASSERT(item.IsOk());
 
 	MyObjectTreeModelNode *node = (MyObjectTreeModelNode*)item.GetID();
-	switch (col)
-	{
-	case 0:
-		node->m_name = variant.GetString();
-		return true;
-	case 1:
-		node->m_copy = variant.GetString();
-		return true;
-	case 2:
-		node->m_scale = variant.GetString();
-		return true;
-
-	default:;
-		//		wxLogError("MyObjectTreeModel::SetValue: wrong column");
-	}
-	return false;
+	return node->SetValue(variant, col);
 }
 
 bool MyObjectTreeModel::SetValue(const wxVariant &variant, const int item_idx, unsigned int col)
diff --git a/xs/xsp/GUI.xsp b/xs/xsp/GUI.xsp
index b38970c09..51eb36fa8 100644
--- a/xs/xsp/GUI.xsp
+++ b/xs/xsp/GUI.xsp
@@ -131,6 +131,18 @@ void delete_object_from_list()
 void delete_all_objects_from_list()
     %code%{ Slic3r::GUI::delete_all_objects_from_list(); %};
 
+void set_object_count(int idx, int count)
+    %code%{ Slic3r::GUI::set_object_count(idx, count); %};
+
+void set_object_scale(int idx, int scale)
+    %code%{ Slic3r::GUI::set_object_scale(idx, scale); %};
+
+void unselect_objects()
+    %code%{ Slic3r::GUI::unselect_objects(); %};
+
+void select_current_object(int idx)
+    %code%{ Slic3r::GUI::select_current_object(idx); %};
+
 std::string fold_utf8_to_ascii(const char *src)
     %code%{ RETVAL = Slic3r::fold_utf8_to_ascii(src); %};