WOW, thanks BEM.

Looks like Futaba is transitioning from "simple" radio control units to what could almost be described as a flight control system...

Given the lack of backward capability with XXMhz (non-modularised) it looks like I'm stuck with the 14MZ, which I have a TM-14 modul and 2 RX's for 2.4 only events. With the en-mass switch to 2.4 I have no more problems on XXMhz except for the odd fool at the club who thinks he's the only one still on XXMhz and doesn't bother to check the keyboard or what length antenna is sticking out of my set while I'm flying in the pilot station...