BTW, I contacted Futaba about the mode 2 vs mode 4 bit.I got an automated response that reminded me there could be mechanical differences. For example, mode 1 swaps elevator and throttle compared to mode 2. One stick of course has a spring and one has a rachet that have to be swapped. I can't think of any mechanical differences between 2 and 4. Rudder and aileron are swapped. Still though they say mode 2 is stocked, modes 1, 3, and 4 have to be special ordered.

I followed up to ask exactly what has to be changed. Doesn't make much sense to advertise a software selectable mode, but only if you special order from the factory in the fine print! That's what we used to do, and when we didn't want to do that, we swapped and re-soldered the wires from the sticks.

I'm curious how this impacts a trainer slave setup? I learned on mode 4, but I don't want to teach anyone mode 4. I'll want the slave radio set to mode 2, and the master set to mode 4. Anyone know if I can do that?

One other question. I was looking on craigslist yesterday. It might intersting to buy out someone with an upgraded trainer, plus a radio and other accessories I need. I saw a bunch of folks with 72Mhz radios. What's the story on that? I see the new ones are 2.4Ghz. That was one of the final straws that took me out of RC when they changed the frequencies and I would have to replace my $500 radio. Are the 72Mhz radios still in use legitimately?