This is the feature that Vectric takes a loooot of money for, you need V-Carve Pro for that and is the only reason that I am contemplating buying V-Carve at all. I can do the inlays with Estlcam (see my linked moth above), but it is a pain.
I did offer to try the Millmage Alpha/Beta when you started the program and even told you that this was my “specialty”, so to speak and that this was the feature that was the most important to me, since no program can do it easily (except for V-Carve, but they couldn’t a year back). If you can implement this feature and also add the possibility to do that with a pointy ball nose, you win. 
Interestingly engough Cutting it Close published another video on V-Carve inlays today (which is way better than my explanation):
That’s what we want. 