SJN,

I think it adds some safety. I split the other channels too to spread out the electrical load.

One receiver operates-

outboard elevons
left rudder
nose wheel servo
airbrake servo
brake servo
retract servo

The other operates-

inboard elevons
right rudder
throttle (to ECU)
aux. engine control (also to ECU)

That way, if I loose the receiver that controls the engine, the ECU will shut it down.

Bob