Maybe Chuck, but I always thought English folks were capabile of such all by themselves. When folks are calling 2 9/16 and 2 5/8 inch chambers "2 1/2", I would think they are already safe from rational advantages of metric system. Is excentric a good word here? One that Brits are proud to wear?

Don't forget that even USA's NASA has been reported to have sometimes been unable to square the metric units with English ones, with notable failures resulting.

Niklas