AR500 is just fine. It's a full range radio, but is 5 channel, which is it's only limitation. But with that, you can channel all four basic functions (Aileron, Throttle, Elevator, and Rudder) as well as one more auxiliary slot.

As a side note, I'd use a Voltwatch in that slot or Y cable one to one of the other slots. Consider Voltwatch in your plane.. it could save your plane some day.

http://www3.towerhobbies.com/cgi-bin...&I=LXHDJ2&P=ML

CGr.