Gotta tell ya, as far as accuracy is concerned, the backplot run time for milling is pretty good.
And it is fairly accurate for a simple drill cycle.
However, for operations like peck drilling, tapping, boring and other canned cycles that do multiple retracts, reversing the spindle, or feeding out, the machining time estimate really sucks!
My opinion is based on almost 20 years experience with MasterCam.
ObrienDave. MasterCam since V6. Gcode since 1983.
The nose you punch today may belong to the butt you have to kiss tomorrow.