Wel, I've figured out a way to do it but it would involve mixing servos and I'm not sure I want to do that. I am using Hitec HS425BB servos. I was reading on Servo City's web site that Hitec and Futaba servos turn in opposite directions given the same input. So if I changed one of the flap servos to a Futaba of about the same speed and torque, it should work. It means snaking the servo wire out of the wing and then pulling it back through the formers but it could be done. I don't know if I want to mix servos though.