I have a 6XAS, and I got my hands on a Futaba 4VF buddy box off of Ebay.

My plane is trimmed out perfect to the point all trims are at neutral and it flies like a dream. When I put the buddy box on (with all trims at neutral) and switch to buddy box (on the 6XAS), every control surface is way out. It is so far out that the trims on the buddy box (at their max) do not bring the control surfaces back to a neutral position.

Today, my instructor and I had to change settings on the servos and clevises so that when we switched to buddy box, it would go as close as we could get it to neutral.

Anyone know why this would be? Are there any internal settings on the 4VF I can change to alleviate this?