Hello, I was trying to do a post & core case today. Is there any way to merge two STL files into one? For example, if STL file (A) contains area 1,2, and the second STL file (B) contains area 2,3 I want all areas 1,2, and 3. Is there a way to do this? Adding extra die only selects one or the other. Adding extra jaw seems to work maybe 1 out of 30 tries. Mostly errors when selecting areas to add.