Mark -

I'll confess, you caught me on the decimal point error. I used a cheap caliper that I picked up to keep around the office. It has inch and metric vernier scales, but the "compromise" to fit them both on makes neither of them legible. The inch scale reads in 1/128 inch increments, and the metric supposedly is to .05 mm, but blem on the markings got misread as .5 mm.

I think I'll give that "mike" to one of the kids in the neighborhood to dig in the sandbox with and I'll walk out to the shop where I have some real tools when I need something measured from now on.

John