Quote:
Originally Posted by JesseK
We do have a reamer, but have had mixed results when using it on oblong holes. Using a micrometer on a sample after under-sizing still shows a position margin of error of around +/- 0.001 in a dimension.
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On a DIY setup, that's pretty respectable. You could try running a spring/multiple finishing passes to see if that helps remove hole eccentricity.