Hi Peteroznewman,

My  Model right now is working with no errors but the material below the plunger seems to be sinking into the solid. I did check large deflection on and I did give a large pinball radius at contact surfaces. I dont know whether it is due to contact or mesh.  Can you please check. I can send the  Workbench Project Archive .wbpz file if it helps. It would be of great help.