If you draw a line across the hub of the prop to the barrel, when you run and not hit anything......should the line be broken? If this does happen, is it a indication of the prop needing to be repacked? If it is ok....how much slip would be normal? Cleaned off the carbon and noticed mine had changed.....moved about a inch. Not sure if it has gone full circle or not, but it's not lined up. Have not hit anything since I re-marked it.