Howard,

How do you compensate for the rotation of the earth and fact that the world is an oblong sphere?

You are one sick pup - to be precise!

Seriously though, since you like such precision, I am curious about how often you lap since theoretically, any stone will wear with each pass.

What is your tolorance? Is it a matter of strokes, after a side of a tool, after each tool, or do you use a timer, or do go by instinct?

Thanks!