I had a similar problem, just to the right. It was my gyro. the guy at the LHS spooled it up in his hand, then rotated the heli left and right. You can actually hear it whine (or not.) I have same blades and motors. I now have it at a decent hover. I'll go back to LHS soon and have him tune it for me. I need to hurry up on that before I break it again. )