I was using a digital caliper switched to the digital mic. It is actually more accurate, the flats work great on round stock.
Works great with the lathe, most think the kungfu lathes, and the dials are chinese, calibration off.
I am very happy to report and have discovered that is false, the .00001 vary some but overall real good.
This last project completed depended on the mic and the lathe calibration to make the things come together.
The 1/2 pins that are yet to be assembled, being an interference fit are ready. Working on some bushing and then it goes together.