Best is if you can set them with ring gages, I've
been making do with micrometers. Not right but
they still show variation at the 0.0001 level.


I made my own ring guages. Piece of cake, just a little lathe work.
After they are ground on the ID, you just need someone with a very
accurate tool to measure them. Then stamp this reading on your
homemade guage. In my case, I traded a favor with Joe Way (seen on
this NG)

Karl