I'll do that! Thanks! I don't have a modern digital mic. I still use the old fashion calibrated mic which I have to put my glasses on to read. I keep thinking I ought to get a new modern mic, but I'm use to the old one.

I was thinking Whitworth used a 45 degree V, but there are many things I am wrong about.

I'm going to get that book.

Last edited by pooch; 12/17/16 12:52 AM.