I would just leave the fin alone. It should still fly straight. Besides thn you can paint the offending fin a different color and name the bird "offending FINatical fist of fury" then you can tell every one you built it that way on purpose.
This last weekend, I signed off a gents L2 on a jr with a J350. WoW talk about fast! Luckily he had a Rocket Hunter on board.
I also got to watch Tim fly his prototype many times in a row. On the first flight I comment " nice tangled shroud lines. "" What shroudlines" he said. He was flying the prototype on a 3 maybe 3 1/2 foot streamer. Fast accent, fast descent. 3 or 4 times with no damage whatsoever. Don't do this though as it will probably void your warranty. Can't wait for this weekend to start building mine.