I witnessed the final flight of that famous (infamous) T6.
Maybe someone can verify what I heard: One wing, I believe the outboard, first failed at a Brodak contest. The plane was repaired and then, after many more flights, that wing failed again.
The poor bird could not take much more of the loads Joe put on it during some very good corners. At Dale Gleason's fish fry one year, the plane made it thru the first half of the wingover. On the second half, right at the pull-out to level flight, the wing that had failed before departed once again. Immediately after that, the "good" wing failed and the fuselage and tail section lawn-darted into the ground. Now, I wish I had filmed it. It was spectacular!
After the crash, a circle of humanity surrounded the remains of the valiant soldier. It looked like the German High Command going over the plans for Operation Barbarossa.
There was no point in trying to repair it. Too many pieces, and, as stated, oil soaked wood.