Hmm... so, the main problems most likely result from having a 60-year old three-jaw, heh... I'm going to be buying a four-jaw pretty soon, so after that my worries will be over. I know three-jaws are not repeatable, especially ones three times older than I am, but I've always put an indicator on the part to adjust the runout. Ahh, I guess it's just time to retire the poor ol' thing. Thanks for all the advice, fellas.
I wouldn't get rid of that chuck. It's not that it's bad, its just a limitation of the design. The only thing 3 scroll chucks have going for them is convenience.
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