P3P, all stock. 65 flights in. Came home tonight after over water flying. Did visual inspection...as soon as I flipped bird over, I heard a rattle inside. Uh oh I thought. I figured at first it might be a pebble that got kicked up and inside during takeoff from dirt/grassy area. I took battery out, rotated bird a few times, and out popped the below. After a few minutes looking very hard, found where it broke off from, it's got a matching partner on other side of battery mount. The pics suck, I'm just throwing this out there for tips and thoughts and opinions, this is where I learn, from all you good people. Thanks in advance.