On my Crown, it seems like the easiest way to load a film holder is to lift the ground glass up just enough to insert a couple of inches of the film holder, and then slam the rest home until it seats properly. Is this the proper way? Won't this tend to wear out the film holder and/or the felt strips along the top and bottom of the film gate?

Instead of slamming the rest home after inserting a couple of inches, I can, with some difficulty, grab the center of the back at the edges and lift it just a little more so there's less slamming and more gentle pushing. Kind of a PIA though, especially when standing.

So is slamming the thing home ok?