I had trouble with mine when the tail rotor motor wire became unattached from the main terminal of the tail rotor motor. Not really a big deal, I just soldered it back on. Luckily, I was just hovering when the wire came off, and not so far from the ground. The heli spun in circles since there was no tail rotor, and I just landed pretty quickly. It did scare me a bit, but just as a precaution, I did solder the other wire that did not come off, thinking preemptively for the next incident. Haven't really flown it for a long while. I think I might try to sell it. How did your's work out after some time. Looks like you were looking for some feedback a while ago...