RE: Info on servo reversing
Josh seems to have Checked out but I can offer my opinion....
With a larege plane, use two seperate channels and two sets of extensions.
Even on a 72 inch model, I would run two channels mixed and dual extensions...
redundancy is nice.
If you have two servos for two elevators, then consider the weight trade off between two extensions
versus a "Servo Reverser" with a "Y" Harness.... and the later offers no redundancy.
With a smaller plane, use one servo to power both elevators. Use a Torque Rod between the two...