many years ago,when i worked in a shop, i had to fix a drive pully. floated some brass in it and it was not balanced so, i used a lawnmowed blade balancer to find the high side and ended up brazing a penny on the outher side to balance it. iff thick enough you could drill (not all the way through) a series of holes to remove enough metal to bring into balance,sorry for the long post. hope it helps, jimmy
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