I'm wondering if anyone has some ideas to attach the custom plate holder to the camera? I want to make the ground glass a removeable part. Esentially, the same thing as the plate holder to ensure the gg is at the same distance as the film plane. I was thinking of some kind of latch or lock - similar to the way you put a hasselblad back on the body (bottom first than latch at the top). Anyone have any sources for this kind of hardware.