Bax,
I have been flying Futaba for many years, in fact I've never used anything else! I've had a 9C for several years now and about a year ago I decided to try a 2.4 system without starting over and ended up purchasing an XPS module and receiver to experiment with. Over the last 12 months I've been switching back and forth between a standard Futaba FM module and the XPS module on a regular basis. Within the last couple of months I've noticed a developing lockout problem when using just the XPS system. I'm now getting intermittant lockouts nearly every time I use the XPS module but still have'nt noticed anything wrong when the FM module is being used. I had the XPS module replaced with a new one and am still seeing major lockouts. Last weekend I borrowed a friends 9C, swapped Campacs and installed the XPS module. My plane flew perfectly...no lockouts. I visually checked the pins in my transmitter and couldn't find any bad solder joints. Can I get my transmitter looked at? I understand Futaba frowns on aftermarket modules but it's what I've got. Can you tell me if you've heard of similar problems and suggest a course of action...if I can't fly...I'll die!!
Thanks so much for any suggestions!

Doug