I have had this quad for about 4 months now. It is really a good bird. But here the last 3 flights when I push the take off button it will start to take off but it is as if the left rotors are not going as fast as the right rotors, so it will tip. When I throttle up manual there is no problems. Take it up about 6 ft and it will hold right there.(holds better at higher altitude though). Any one with any ideas. Other than that this bird is really good. And I have been in this now for about 4 months now.