I was giving 415 a whirl to see whether I can get full instructions for it into the “Terrain Relief Models, Unabridged” docs, and I think I’ve got it mostly figured.
I did have one major issue (may have been me overlooking something). In the 3D roughing toolpath, I didn’t see any way of limiting the depth. A larger terrain relief model is deeper than the flute length on the 1/4" mills I use to rough it out (before finishing with tapers), so I have to be able to set the stepdown (or at least a maximum stepdown) if I’m not going to be trying to rough it out with the shank.
I usually use a 1/4" ball (0.75" flute length) to rough, and the actual carved model depth is about 30mm (almost 1.25") when the taper (31.75mm flute length) finishes with it.
Am I missing something obvious?