Alan,

If you haven't already seen it, have a look at the latest BMFA News (page 4) about modifying transmitters. I also converted my MX22 to an internal aerial when I fitted the Spektrum module, but according to Manny Williamson the BMFA insurance would not be valid and that would apply to club flying sites as well as JMA, or other organised events. I've now put my Tx back to standard with the vulnerable coax cable between the Spektrum module and the aerial - messy but legal[:@] The only way around this would be to have a modified Tx tested to see whether it complied with the relevant standards, but I know from experience that is expensive[&o]

It's a pity that Spektrum didn't make a Tx module like the Futaba one, with a built in aerial and no easy to damage exposed coax cable, but maybe they will?. Although they are making the 12 channel module for the MC24, they apparently do not have any plans at the moment to make a 12 channel module for the MX22 or MX24, according to Horizon in Germany.

Roger