Thanks Dave,

Yes, tried several resets, talking radio you may well be right, I think I've cracked the brake one tonight, plugged a servo in and noticed there was no brake channel movement until about 85% down elevator so I reprogrammed the mix and it seems obviously to take it's switching points better although it is sometimes intermittent in operation.
I'll ring you tomorrow regarding retract valve, even though programmed correctly after switch rc off/on sometimes it doesn't react at all and sometimes it (worryingly) brings the gear up and locks up until a reset, even though the gear switch was in down command at switch off.

Anyway, thanks very much for replying, talk to you tomorrow,

Regards,
Gary.