[mickmate]

I didn't even take a picture of it, I'll get one. I welded some plate to a nut and a small piece off that. The two planes kept the circular cutter off the edge the same distance. Like a mini router as you'd suggested. I'm thinking next of a fence for the die grinder with a carbide burr and just keep it perpendicular to the edge while I run it around at different angles to cut the round profile of the edge. I could probably have done it by hand already instead of dinking around with tools.