"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
. 3.70...
Ignoramus10056 fired this volley in
:

It took about an hour, but I am finally done, trammed it with a dial
indicator. 0.001" over about 4 inches

Hardly done! G

That means it's off more than two tenths just over the diameter of a 1"
bit.

Would you mind explaining that math? Not saying you are wrong, but it
doesn't make sense to me. How can it be off true of .001 at 4 inches, and
off true of .2 at 1 inch?