I'm reading all of these threads about the "ultimate GPS Tracker", and it just makes me scratch my head and wonder WHY didn't DJI go just a baby-step farther with the Pilot app and build GPS Tracking in???? I may be missing something, but we already have an active GPS Tracking system built into our P3Ps, so why in heck not utilize it for TRACKING as well? All that would have to be done is to put a small-ish back-up rechargeable battery that would power the GPS Tracking feature in the app in the event of a runaway drone that flies until the main battery dies. This small back-up power for the GPS would only have to be used in the event of total power outage of the main battery. In fact, I would bet money that this could be done with a simple firmware upgrade and app update; no additional equipment or weight (other than maybe the coin-sized battery as a back-up option). DJI, please keep track of my suggestion!