The couple of 3d cuts I have done using a roughing path seem to have a problem with the roughing path cutting into the finish path area in places. I used the v3m lily file with the concave dish style that is a free sample from Vectric. I have checked all the settings a few times in the partworks 3d software. When I do a preview the files looks fine on the screem. When I actually cut the files the roughing path has a few spots where it cuts into the finishing area. I import the 3d model into Partworks and preview there with no cutting error on the screen. I have read some other posts that are concerned with the collet hitting the surface but that is not the problem here.