I'm using a Futaba 7C 2.4 Tx and the aircraft Sig extra 300 has 2 elev. servos.
Plane is used and has a "Y" for the servos to the Rx.

Of course one servo travels the wrong way (Left half of the Elv.)
Not sure if I can Slave another channel with this Tx ?
I've never done this kinda set up,

All help is appreciated,

Bob