I got an M&P awhile back and wanted to drift the rear sight over just a hair. So I back out the screw with a hex wrench and take a whack at it with my nylon punch and little hammer. No work. She won't budge. The whole procedure is a bit crude for my preferences anyway and so I think I'll get a proper tool for it. But here's the question I thought I would post: Do you have a favorite 1911/M&P/XD etc. sight tool that you swear by? or doesn't matter which one to get?