Thats it, I am giving up on the Autopilot software.. It just doesn't work on the Phantom 4! The setting were 75ft behind, 125ft above in follow mode.. But as you can see, its not staying at 125ft altitude! We were staying under 10 mph as well. Last time the repair cost me $554, now its off to repair again! but didn't break the gimbal this time.. Stay away from the Autopilot software, at least on iOS... I was using a brand new iPad Mini 4 with the external GPS that Autopilot recommended, a "Dual Electronics XGPS150A Universal Bluetooth GPS Receiver"