Well I'm having problems with my PW Extra and a fuji 50 with magneto ignition. I'm using Futaba transmitter and FMA Direct co-pilot. Both of the suppliers have just told me to move the antenna location from the bottom of the fuselage to the top. I've also have a y-connection for the elevators and have been told to use a filter on that. Will try both of these this weekend to see if that solves the issues