OK, better post some content here, or I'll get in trouble with the rec.models.rockets cabal...
Flew my battle worn AT Strongarm on an F52-5 today. As a payload a parachute bearing plastic Donald Duck was ejected at apogee, but nothing else. I suspect that Don was crushed down on top of the Strongarm's chute due to the massive G forces of that terrifying Blue Thunder propellant thereby preventing the chute from deploying...
Donald was never recovered. He was spotted headed for the next county after catching a thermal... Strongarm came down hard... again... and cracked a fin hard enough this time to actually pull it loose from the Fin Lok(R) retention system, and also cracked a previously repaired fracture on the same fin from many flights ago.
This fin is shot.
I'm thinking of just cutting off all four fins (they've all been equally cracked, and repaired), routing out the slot (hopefully enough), and replacing them with TTWTTMM model aircraft plywood copies.
Lot's 'o work.
What's the groups accepted method of refurbishing a badly beaten set of AT fins?