ORIGINAL: majortom-RCU
Explanation for 'adding ballast:' On larger props I don't remove anything to balance, I add either a small blob of thickened epoxy for light ballast, or a tiny bit of lead (snipped off a coil of plumber's solder), and I add it somewhere around the hub, within the area that stays under the spinner, at the high spot of the first balance, add or subtract ballast until it will hold any angle in the balancer without moving.