PureTexan, chickenthief, knowing how and doing it are two way different things. But go back and look at SIGP2101's Mauserwerke photos. In one photo they have two guys at two machines and they are observing their work through magnification optics built into the machines. I recall being struck by that because I had never seen such machines in any machine shop, then it struck me, some of these skills must require watchmakers and these are the kinds of machines watchmakers must use. Talk about a forgotten art! Like you said, I could not imagine drilling a 1mm hole 1 cm deep and then turning it into a broached, rectangular hole 5 mm long by 1 mm wide. If my life depended on it.
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