Hey there folks, sort of an odd question. I just finished installing the anti-interference board that DJI supplies inside my P2. I had to take the top shell off to do this. I was extremely careful. Now, I've put everything back together, and I notice that when I flip the P2 upside down, I hear a slight "click" sound, as if there's a tiny loose screw that was sitting on the bottom of the shell and then fell onto the underside of the top shell when I flipped the P2 over. I'm quite sure I did not leave any screws inside the shell when I put everything back together, and I was careful not to leave anything loose. So this is a really silly request, but...can anyone do me the favour of holding their Phantom in their hands, then quickly flip it upside down, and tell me if you hear anything? If you do, then at least I know this is a normal sound, and not to worry.