But why would the currnet shaft be damaged, surely they wouldn't have heated THAT shaft. Can't see any reason for heating a shaft to that extent and then reinstalling it (ok there are plenty of people that instal shafts in many heads etc, but it would be very strange to hear someone heating a head to that extent and reinstalling the same shaft)
Would make much more sense to hear that this shaft is new, and the old shaft broke or was replaced .... and hence it's the old one that is/was damaged.
