Configuration that works reasonably well for 1/8" milling. Probably could speed up IPM, but I only had one bit left and wasn't interested in finding out. First two bits broke without any warning: milling fine and then snap...Note bit was pushed up into collet exposing only the flutes. This was a Grizzly D2699, but I also need to try G9670 which is less than half the price
Sprocket dxf was done in Sprocketeer, imported into Alibre so the D-hole could be added, and then gcode generated in Cut2D