Mounting a Fuji W 300 in a Copal #3

This is a timely topic. I attempted to mount a Schneider-Xenar 210/ f-4.5 on a Copal 3 Technika board. The lens mounted OK, but on my Chamonix 045N-2, the aperture lever was binding up on the front standard where the board attaches at the bottom. My good friend Lon Overacker suggested I fashion a spacer and place it between the the rear of the shutter and the board. He had to do the same thing for a Nikkor 450 in a Copal-3. So, a little time with some cardboard, and a Sharpie to blacken it, and...Voila! no binding.

I may, at some point, have someone make a metal spacer (about 2mm thick for my Chamonix) but the hard cardborad seems to working, for now.

--P

I found a solution!!! Cheap, readily available, easy to do, looks like it belongs there, and it keeps the lens from rotating.
Any plumbing or hardware store will have a "Tub drain gasket". It is flat and made out of dense black rubber. I had to enlarge the center hole about 1/4" but that was easy to do using a utility knife.
Dimensions are 3" x 1 7/8" x 1/8". The visible outer circle is factory made, 1/8" thick and it compresses slightly. I tightened it up real snug and I can not make the lens rotate. It really looks like it is an original part of the lens(OEM). I think it's perfect, but time will tell. I'm going to do something similar to each lens I have, if nothing else just to stop the rotation.
Thanks to everyone, and I hope someone else will try this trick, I'm very happy with it.
Bill