Ed,
These new radios aint for the faint of heart ha!!
Seriously though I like the system, the failsafe leaves a lot to be desired though. It is immune to spark and mechanical noise, no frequency clips to deal with, the 603fs receiver is the one to have as far as I am concerned, plus its a new toy to play with!!
I was looking for 50 meg stuff when I got in a few years back but they had just come out with the JR synthisized units on 75, so I went that route.
The throttle trim problem can be solved with 120 on the open throttle side and 15 to 20 on the kill side, the trim at zero and then there is plenty of trim adjustment..
mike sr