Pretty neat idea, but in my industry inside corners without radii are usually not allowed becasue it is a big concentration for stress.
Very good use of a user defined operation!
I have this technique used for engraving, but with a vertical tool axis.
For an inside sharp corner, place a pointed tool at the bottom, and "drag" it up the corner.
Thank you Mark. The reason that we can't drag a pointed 90° tool up the corner is the part size. The machine heads are to big. We would have collision with the machine head at the part. Also we are able to cut the corner at a closed pocket that way. We could use relative to drive to cut so. But this thakes to much time/cost for programing.