I have an Uberti SAA that is 3 or so years old. Got it second hand and it hadn't been shot much. Pulling the base pin out to remove the cylinder is a pain. When I first got it out, it had a couple small burrs on the bevel that I believed caused it to stick. I filed those out. Emory clothed the whole length of the pin. I even turned down the back of the pin where it slides into the hole front of the trigger. The only thing I haven't taken apart is the spring slide the bevel rests in. It still sticks! I put a liberal dose of lithium grease on the pin when I reinstall it. Am I missing something, these guns usually aren't that difficult to make work.