I am planning to do some grinding and cleaning up on a stock crank. I don’t wanna remove so much that Mallory needs to be added but will do some weighing and comparing of stock vs the rods, pistons, rings, rod bearings, pins I’ll be running. Question..... when chamfering oil holes how aggressive should a person get? Length of chamfer? How much to chamfer the leading edge vs the trailing edge of the oil hole? What’s your experience?