We have models of up to 3000 parts in Pro/Engineer. We just upgraded to WF4 M092 and are having trouble rotating, panning and zooming our models. The display is very choppy. We had no issues with these models in WF3. I have updated to the certified graphic card versions for WF4 and am still having the issues. Has anyone ran into this and/or does anyone have any ideas? I would really appreciate any help.