The Airtronics VG600 is a non-computer radio. This means that you can't plug in the aileron servos into 2 separate channels in the receiver. Being able to do this is a function of a computer radio only. In order for you to use 2 aileron servos with this radio to by the use of a Y-harness. Plug the Y-harness into channel 2 on the receiver and then plug each servo into each side of the Y-harness (or servo extensions if needed). I know this isn't what you asked about, but this is the only way to do it with this radio.

Ken