Sorry bizHB, I understand now. You want precise shape as well as depth.
There is a thread in the archives about using contour gages. IIRC, Leo
L. discussed profiling with pins vs fingers. I think the Lee Valley
catalog shows most of the marking and measuring tools woodturners use.
Turn to Safety, Arch
Fortiter
http://community.webtv.net/almcc/MacsMusings