I feel all props should be checked for imbalance. Some people have a certain size, above which they feel they should be balanced. It takes so little effort to do, I just go ahead and check them all. I really don't pay attention to the hub as it is so close to center, I feel the imbalance here is negligible, unless really out of whack. How are you guys balancing the hub, you certainly do not want to remove materail?