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Number drills come in 1/2 jet sizes, ditto for letter drills and a wee bit of silicone carbide sanding can take a couple thou off a drill bit fairly fast. Truevalue and harborfright has some of both drill bits. Bit of silver solder if you overdrill. Get too carried away and it becomes responsive to local atmospheric conditions day to day.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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