KJ I’ve gotta ask you sometime about your mention of using two gaskets with a gen crystal in a BP and the stair-step thing. It sounds like something I should learn about. I put a gen Xtal with stock BP gasket in a BP while I was testing out my new crystal press. Would be epic to understand a little more about how proper two gaskets would be by comparison on a BP.. sounds like I needs to learns me something nice as I learn to use this thing more and more
Use the original BP gasket, which is very short, about 1.2mm. Shave the gen-spec gasket down to the same height. Best way to do that is put it in a junk crystal with no cyclops and tape the top side to a die. Use the die as a handle, and sand the gasket down on a flat piece of 320 grit on a bench. Rotate often and check progress often. You will nearly touch the crystal underside with the paper by the time you get the right height. Switch to 400 grit near the end and don't use any black sandpaper, it can stain the gasket.
Set the original gasket in the case opening where it normally goes, set the gen-spec gasket on the new crystal. Press it in by hand as much as possible with the cyclops aligned, then finish with a crystal press. Make sure one gasket goes fully inside the other without any crushing or de-forming of either. If it absolutely won't go, you can lightly bevel sand the bottom edge of the inner gasket so you can overcome the top edge of the outer gasket. It's like a funnel shape and slips in easier. If that doesn't fit, lightly reduce the inner gasket diameter, you can sand it right on the crystal by swipe rolling it on the bench sandpaper.
If the fit ends up too loose you can use UV glue or clear epoxy to keep the gaskets together.
Two gaskets
Another one, this watch
Became this
Using two gaskets and a Clark's gen-spec with AR cyclops