Ken,

I second Mike B's advice. You should never remove material from the prop hub to balance. These are where the higest loads are and you could be facing a dangerous situation. There have been a few good tips here on what to do.

If you take off material from closer to the tip, you will find you have to remove only 5 or 10% of the material you would from the hub as the longer moment arm makes the removed material more effective.

Duke