I've used flysky junk for flight and land use, quickly changed to spektrum for air, and went back to futaba for land use. The gt3c only runs the rock crawler and that's only because I could get it to mix the rear steer the way I wanted it to. Dam thing badly makes 100 feet till its out of range. The pos 8 channel I had for one of my heli was such a fricken joke it wasn't even funny. It's "programmable" but wouldn't store model memory properly, and it's rage sucked nearly as bad as the gt3c. Only difference I'd it cost me a lot more money before I realized it had random range and glitch issues and threw the pos out. Can't knock the one I haven't tried, but I'll never have another. But yeah they will keep telling you it's the rx or a bad gryo, or you need to open up the TX and solder a new antenna on. Yep, nope I'll pay the extra money and keep going with futab on land and spektrum if I ever get another air based rc. Wish you the best of luck, and hope it all works out.