I recently saw two different pistols with red dot mounts attached to the frame, IE drilled into the frame. One was a nice looking series 70 Colt the other a Les Baer setup for Bullseye wadcutters. The Colt was $700 asking price and the Les Baer twice that. How much would drilling the frame affect reliability and perhaps the value? The holes are there and there would be no going back without a refinish. Any issues with frames cracking with use?