im going to do more checking today, but i also tried swamping checks. I left my jr 3810 on ch 72 ( im using ch 73 on the model) beside the aircraft and could ony get 12ft away. I could get further if the aerial was actually left lying as if it was within the wing! Any other posn wouldnt work.

Silver, so if i can get 30ft away before failsafe occurs, with the interfering tranny 1ft away from the model, is that a good check?

I was considering buying a JR synth module. Would that avoid the need to get tuning/alignment done by JRs service centre?