I saved this pic many years ago from a H.A.M.B. post. Sorry I don't know who to give props to. This looks like a detail I'd like to replicate someday. I don't have a lathe and probably never will. Has anyone done something like this chucking the bolt into a drill press and using an angle grinder with a flapper wheel? Or, not wanting to stand on your head to do this, does it seem feasible to mount a hand held drill to a bench and chuck the bolt in it and then use the flapper wheel? Any thoughts/ideas appreciated.