vtol_guy

for purposes of my next project, i basically need some sort of device that, when you flick a switch on yure tranny (eg channe 5) then it would (eg) make channels 1 and 4 swap round with each other so 1 becomes 4 and 4 becomes 1. I know this could be done with a relay and a servo but i would like a much more accurate digital version of anything that exists if it does?

just incase anyone is wondering, im making a tilt wing plane and when the wings are vertical, ailerons will control yaw, in horizontal it'll control roll so you see my problem, its a VTOL craft, scale dynavert

cheers for any help