And not that it was asked but I still prefer the old-fashioned radio systems and not the computerized systems, I have enough on my mind dealing with my desktop. For sharing transmiters on different planes, just buy a 2nd or 3rd or what-have-you set of servos, receiver and go. Just remember to check each plane's settings before flying (WHICH YOU ARE SUPPOSED TO DO ANYWAYS)

Just my 3-cents