Donn,
The "trick" is to figure out the geometry of the piece being created. Then one needs to deduce the angles needed to cut that geometry, obtain the bits, create the cutting files and go from there.
There are some programs that are said to figure these paths though I don't know of any. I have modeled both raised and inset cutting in RHINO and have been happy with the results. The method I use takes considerable time.
Ron Brown - rgbrown@itexas.net
If Stupidity got us into this mess,
then why can't it get us out? - Will Rogers