I have commented on the dx7 not registering the airplane when you turn on, and then turn the airplane off and on and it does several times in these forums. Never got an answer, but had 20 to 25 flights on a Eurofighter with it.

Last weekend I switched it out to 9 channel spektrum. Won't have results till I fly next, although I flew another Euro on the 9 channel system, and it was flawless.