The program failure has nothing to do with the plunge rate. One side 1 with the special cutter, it plunges down to cut the center cube cuts a square, then retracts to cut the middle cube, it does not come all the way out. The cutter is still in a .835" hole. Anyone who tries to use the program make sure you single block through it for each side and make sure you verify what it is doing.
Vince