Regarding the Airtronics RDS8000, it is apparent that the airplane flyers are not reading the whole manual that comes with the radio. It is possible to set-up multiple dual rates and expo for elevator, aileron, and rudder and put them on one switch with three positions (you can get four positions if you use a second switch). Basically, you change the transmitter from airplane mode to helicopter mode and you can do this easily. You do lose some of the pre-programmed airplane functions, but you still have the two programmable mixes that can compensate for what you lost and want. The question is what functions are more important to you.