[williamblake]

I was referring to the precision of the boxes, not Brien Forester's quote about it, and more specifically the surface that is mirror polished to several ten-thousandths of an inch as estimated with a precision straight edge and toolmaker's square by someone who was a precision machinist, engineer, "master craftsman" (member of a professional guild), and a member of Mensa. These tools are so precise that if you drop them on the ground, handle them the wrong way or they end up in untrusted hands, they have to be re-calibrated and verified.

I apologize if this is an order of magnitude beyond most peoples' understanding and experience. It's probably not your occupation, so please don't take it personally. As an example of what this degree of precision is, consider a thin hair which is about four thousandths of an inch in diameter. If you slice that diameter up ten times, you will then have something that is as small as or at least reasonably approaching this measurement.

[kevinwang]

I see. Very interesting if true.