ozymax,
I use CopyCat infrequently. So I would need to spend time looking at both Mach and Copycat to get a better perspective of the problem.
I use it mostly to get the profiles of objects for both the lathe and the mill by backplotting the gcode.
As far as the manual goes, well, I wrote it because there was no instructions on how to use it and accomplished the writing by hacking away at it.
Understand your frustration.....what more can i say.
Maybe Ron will read this post and can look into it since it's a NFS program.
RICH