I would be interested to see if they can determine the maintenance history and overspeed occurrence during practice autos. I wouldn't be surprised they don't find any more spindles that are cracked. As a private owner this is really a hardship on me. Why is it that all owners of a particular model of aircraft have to be penalized because an idiot abuses or flies outside of parameters and doesn't report it. I would suspect they have no way of knowing the history of overspeeds on that ship. FAA did the same thing to me on my Mooney. Some idiot decides to do aerobatics and crack the aileron control rods so everyone has to have theirs' removed to be re-enforced just in case you do aerobatics that aren't certified for.