RE: Multiple servos for elevator?
For your Futaba 6XA computer radio, I don't think you have the option to mix channels 2 & 5. On the new 7 and 9CAP you do. Your best bet would be the reversing Y. They work and the better ones allow other adjustment as well. Just make sure your full travel throw is exactly the same on both sides, as this can cause some real unhappy situations.