"Bill" wrote in message
...
That was a right on target response, Frank.
Thank you and I'll report results later.
Bill

It looked good. I know with acrylics (I do part time consulting with Lucite
International) that there is some detailed literature on the internet:
http://www.lucitecp.com/literature.asp
I believe most lenses are polycarbonate but machining plastics is fairly
general.
Frank