also if you change crystals out on your radio and receiver alot or even a few times. your stuff will work but might not be tuned in all the way. this is why the fcc says only a licienced repair shop to do this. this is true on the tunning of your stuff it happened to me. me on 54 and friend on 53 one being tuned more on one than the other. glitching)! you could be having RF too. put some Rf filters on your leads this will also help take out any Rf to your receiver. a good fail safe is throttle down settings. this way if your flying and your plane does into fail safe you know because your engine throttles down. bring it it asap and find the issue if its you or someone else.