Has anyone else had this problem? I happened to look at the underside of my P2 today and noticed that on the underside around the motor mounts there are stress cracks. One corner is so bad it looks like it will literally break off at some point in the future. The P2 has never been crashed, never had a hard landing, and never been dropped, also I have never removed the motors so the torque on the screws is whatever the factory set them to. It has around 200 hours of flight time on it and still flies like new, so the metal frame itself is not bent. The cracks are on all 4 corners, I attached pics of the worst two corners, the other two have very small cracks which are appearing around the motor mount screws.