In the last few months I've read alot about receivers and transmitter problems partly due to some problems I've experienced. Some of the things I've discovered are: Never point the transmitter with the antenna pointing straight at the plane, the signal is weakest from the tip of the antenna and doing so may result in "lost" transmission. Always test batteries before each flight. I've gone to the field many times with what I thought was a fully charged battery only to find after one flight it was not safe to fly again. Last summer I was flying my Twist when I suddenly lost control of thr plane as I was landing. The plane landed very hard and tore off the gear. I thought I got a "hit" some how. I repaired the plane and headed back to the field a few days later. When I turned the plane on the plane didn't react for maybe 5 seconds and then there was movement in the servos. I turned the plane off and back on again and after maybe 5 minutes while sitting on the bench the plane lost the transmission. The problem ended up being a bad crystal. If I had flown the plane I would have lost it. You have to be almost a detective at times when it comes to transmitters and receivers. good luck