Trainers are keepers forever. If you prang one, it should be immediately replaced.

Had a fab time yesterday flying a 10 yr old (maybe 11 now) Superstar hot rod in the wind. Great fun just hanging there & flying sideways up & down the length of the runway in a hover (big crosswind) without moving foward. Harrier landings were dead easy & 2' take-off rolls were also possible. It would even hover inverted (didn't try an inverted harrier landing).