diff --git a/AppObjects/FlatCAMObj.py b/AppObjects/FlatCAMObj.py
index 3070ba69..330f4d98 100644
--- a/AppObjects/FlatCAMObj.py
+++ b/AppObjects/FlatCAMObj.py
@@ -459,20 +459,15 @@ class FlatCAMObj(QtCore.QObject):
     def visible(self, value, threaded=True):
         log.debug("FlatCAMObj.visible()")
 
-        def worker_task(app_obj):
-            self.shapes.visible = value
+        # self.shapes.visible = value   # maybe this is slower in VisPy
+        self.shapes.enabled = value
 
-            if self.app.is_legacy is False:
-                # Not all object types has annotations
-                try:
-                    self.annotation.visible = value
-                except Exception:
-                    pass
-
-        if threaded is False:
-            worker_task(app_obj=self.app)
-        else:
-            self.app.worker_task.emit({'fcn': worker_task, 'params': [self]})
+        if self.app.is_legacy is False:
+            # Not all object types has annotations
+            try:
+                self.annotation.visible = value
+            except Exception:
+                pass
 
     @property
     def drawing_tolerance(self):
diff --git a/AppTools/ToolIsolation.py b/AppTools/ToolIsolation.py
index 2c1b4f8f..67d1135b 100644
--- a/AppTools/ToolIsolation.py
+++ b/AppTools/ToolIsolation.py
@@ -1004,7 +1004,11 @@ class ToolIsolation(AppTool, Gerber):
 
         self.on_tool_type(val=self.tool_type_radio.get_value())
 
-        outname = self.app.collection.get_by_name(self.object_combo.get_value()).options['name']
+        loaded_obj = self.app.collection.get_by_name(self.object_combo.get_value())
+        if loaded_obj:
+            outname = loaded_obj.options['name']
+        else:
+            outname = ''
 
         # init the working variables
         self.default_data.clear()
@@ -2030,9 +2034,9 @@ class ToolIsolation(AppTool, Gerber):
                     # transfer the Cut Z and Vtip and VAngle values in case that we use the V-Shape tool in
                     # Gerber UI
                     if tool_type.lower() == 'v':
-                        new_cutz = self.ui.cutz_spinner.get_value()
-                        new_vtipdia = self.ui.tipdia_spinner.get_value()
-                        new_vtipangle = self.ui.tipangle_spinner.get_value()
+                        new_cutz = self.cutz_entry.get_value()
+                        new_vtipdia = self.tipdia_entry.get_value()
+                        new_vtipangle = self.tipangle_entry.get_value()
                         tool_type = 'V'
                         tool_data.update({
                             "name": iso_name,
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7271ea87..a328d91b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ CHANGELOG for FlatCAM beta
 
 =================================================
 
+28.05.2020
+
+- made the visibility change (when using the Spacebar key in Project Tab) to be not threaded and to use the enabled property of the ShapesCollection which should be faster
+
 27.05.2020
 
 - working on Isolation Tool: made to work the Isolation with multiple tools without rest machining