Dave,
Understand what your saying. Here's what is nice. You can go in a pick a particular section of a turned piece along the
Z axis staying outside or inside the undercut, make moves to a point, thus your not restricted. Now exactly how to do that stuff and the exact sequence along with tool definition is a different story. You need to get all the buttons and logic "Synergy" way of doing it down. I hacked away and was sucessfull, then douldn't duplicate what i did
( who takes notes when their hacking away), even posted code. How buggy it is, well who knows ( and they are all buggy!) and there is no forum to ask questions.
RICH