I've attached a .rar file. Both bowls in this .rar file are actually the same. One is just thicker and the thickness of the bowls is not important at all. So it doesn't matter which one of them will be in use. The inner part is the important because this is where the film should be placed (and I wrote, they are the same)..
Can you show me please how to make an assembly of the bowl (one of them) and a circle disk film? I'm just having many difficulties