It's very simple to counterbore the hand crank lugs to create a step for a washer to bear against. I've offered to machine balancers for people who have bought my drill and tap kit, but so far nobody has taken me up on it.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!