Now the second time I flew this it did the same thing, but to the right. With the trainer on, it can clearly be seen the copter wanted to flip right. Off, it flipped right. With the trainer on I was able to move forward, back, left and right - but it still wanted to flip and did so as soon as the trainer balls came off the ground. When I removed the training gear, it flipped right as soon as it had enough lift.