If you want to fly a wing and requires a elevon mixer and your radio is only a 4channel and has none can you buy the Y wire for 2 servos to run the same thing if so what channels on reciver do you hook the ends too 1and 2 is rudder and flap 3 is speed controll 4 is ailerons do you use 1 and 2 sence the wing doesnt have a rudder or a flap