The Multiplex 707 can make 5 of the 7 channels proportional. I have used up to 4 channels this way on my 707. On the Nomadio that also can be proportional. It was designed for with 1/5 scale in mind. The 3rd channel can be used for either a second brake or rear wheel steering. I have both and I have had all you mentioned except for the Futaba. The Multiplex is my favorate but the Nomadio is a very close second. If the receivers were cheaper I would use the Nomadio more. I have over 30 cars and $80 for a receiver for each is too steep for me to replace all of them. But then also on my cars I use more then 3 channels would stay Multiplex. I had the Nomadio Sensor and it was great but when the React came out I got it because it had greater speed and Nomadio bought the molds from Multiplex for their case, so it looks (in shape) identical to my 707. It fits perfectly in my hand and is incrediabally adjustable.