As I noted above ,If you have things set right many times sprut will process very fast.
The trick to help sprutcam process the data and not thrash it in this case.
The operation with the ball mill needs to have the radial stock set to a non zero value like 0.0005 or whatever!
This one setting will change the process time from hours to seconds!
This feature, tool and operation combo causes the program to kind of get stuck or lost I guess.
Hope this helps others that run into long compile times "helps to look at things like this"
md