I am building a 1911 from an 80% frame and needed to ask a question I don't see anywhere. As most of you know, the 2 pins for the hammer and seer have a tapered end on the left side to keep them from falling through and the thumb safety sits on top of them to keep the in. I was wondering what the degree of countersink tool was needed for these pins. I just cut the holes and the only countersink I have is an 82 degree. Is this correct or do I need a different angle?