I have a competent gunsmith making a new pin, but wanted to try my idea. So I cut off an old drill bit, using a carbide blade in my dremel tool I reduced the forward end to approximate diameter and cut the slot where the retaining screw rides. It looks like I am about 1/16 too long. Before I shorten it I was wondering if there is a negative to leaving it long, as long it doesn't stick out too far from breech face.

This ain't a dress rehearsal , Don't Let the Old Man IN