claysmith: As much as you can get. I use the longest dubro arms on the servos and the innermost holes on the horns. And If your looking at other planes look at the extreme flight yak 54 due later this year. It is 87", is built to fly with a strong 50 cc gasser and will weigh around 16lbs. I saw it at toledo and know people that have flown it. Those that have flown it said it is the closest thing they have flown to a 40%'r in a small package.