I was always a techie. Years ago I had two helicopters running on lithium batteries. They were relatively primitive and flew for only 5 minutes on a full charge. I recently got two phantom 3 drones that were dead due to fatal crashes. I got both working. One is complete and works great. The other has a destroyed gimbal but flies with the controller and does send location telemetry to the tablet. I have the stl files to 3D print replacement gimbal parts and will do so after the holidays. By the way, it is winter in Montreal and temp can go down to minus 40 so I am in Florida USA for now. Nothing flies well in Montreal during winter not even birds.