Hey Goose, I'll give this a stab since no one has answered..... a lot of the guys are getting ready for Spadfest. I *thought* I had seen where someone had cut 4" off each end, but don't know if that's accurate or not. If you've got the standard open end wing, I would cut an inch off each end and fly it. You know it's going to increase your roll rate the more you cut it off, while increasing your wing loading. Compare the size of the wing to planes on Tower Hobbies that fly like you want to fly. I wouldn't go past 4" until you find that other post or someone pipes up and gives you more info. You could also post over on Spadworld.net to see if you get an answer. I know Clean, Chris or Gravity can give you the answer you're looking for. Good luck with it!