I'm about to buy a P4p and have read a lot about issues while taking off or flying near metal structures and other such interference. While my P2 doesn't use the DJI Go app, I feel like the old school nature of it is a little more reliable in some situations. Other than the fact that as I was trying to bring the batteries down to 50% for storage recently, it flipped over and flew into the driveway, it has never failed me. One of the motors seems to have a slight hitch which maybe caused the crash or not. I would need to replace the shell and 1 motor. Thoughts?