There may be a way to keep track of changes in the DJI P4, as newer production ones get into the hands of users. There is a sticker on the floor of the battery compartment that has the Drone Model Number. If those change over time, it could be a way to track production changes. Of course the real problem will be trying to find out, from DJI, what has changed. Anyway, just a thought. My Model number is: WM330A I wonder, has anyone else has received a different model?