Hello Peter,nnThank you for your comprehensive reply. This part is molded flat, then rolled up in a cylindrical space, but I have no idea how should I take it into consideration in my model.nThe video shows exactly how it is supposed to move. For the density, when I reduce it to the right amount, it takes a couple of hours, then it stops due to a highly distorted element. I will try smaller sub steps and elements as you suggested. nThank you so much.n