Quote Originally Posted by Greg View Post
Immediately pit that very tiny threaded pin in a zip lock bag and label the bag. I once removed a threaded pin and set it on the counter, only to accidentally hit it and send it flying on to the floor... never found that pin and the floor was painted concrete and not a rug which would have certainly ate it up. Does any one have a simple method of determining where to exactly drill the hole in the lens board to accept the pin? On all my lenses I place a dab of glue from a hot glue gun on the back of the retaining ring or flange. As a backup it secures the retaining ring or flange from rotating and is very easy to remove.
Get a rubber stamp pad. Rub the pad over the screw head. Put the shutter in the lens board hole and press down. You will have a mark where to drill or file out.