Stik
I know the feeling, my propeller is away at the moment for overhaul (5 years). It's an ex Bulldog prop and was brand new. It has the Mk1 hub which apparently cracked round the front (visible) half. The Mk2 cracked round the rear (not visible half), Mk3 supposedly okay.
Mk2 is a compulsory change to Mk3, Mk1 is optional change if the aircraft is aerobatic, crop dusting or attached to more than 300hp. If you don't change it, it's an Eddy current inspection every 100hrs 'on the wing'. My machine isn't cleared for aeros in the UK so it doesn't do any... If it did it would only be gentle loops and rolls as it isn't cleared anywhere for flicks or gyro stuff. This means I don't have to change the hub in theory and 100hrs will take 2 years to do.