Still in first week of flying. Did compass calibration, etc, but phantom is not very stable when I let the joysticks return to neutral. It just sort of floats around in circles,cans sometimes moves forward. I know a little bit of movement is normal, but how much can I expect? Also, I keep hearing people say to stay away from power lines. I love near quite a few power lines, and they run right through my neighborhood. How far away is far enough?