[Piotrsko]

Wont get "zero point zero" in any repeatable fashion in rock or fired stoneware. The drill point is going to hunt a bit by flexing until it finds a start point unless it is larger than 1/4" diameter and you use ridiculously slow feeds with a dull, hard as heck point. You could drill off center and process a correction in, but, that may not be that accurate or repeatable. Definitely not using ancient processes because they couldn't measure to those standards to determine if it's off dimension in the first place. Ditto for lasers and other stone removal.processes.

I can tell that none of you have any stone experience manufacturing items