Sunnen TR-6700 tappet grinder?

funny you should ask, there was an article (on the H.A.M.B. maybe) that told of a guy that chucked them in a drill press and mashed them down on some 120 grit crocus tight across a couple towels. Said it put a crown back on them! Back in the day i'm sure....That or dress a very shallow groove in a wheel, chuck the lifter in a drill and grind them. Still kinda hokey (The H in HAMB)