Hi! Just got my phantom 1.1.1 a few days ago. I'm wondering about the battery low failsafe mode. I thought it is supposed to return to home before landing. I am definitely in GPS mode and getting a good home lock before flying. But when battery low, the phantom just slowly lands where it is, it doesn't attempt to fly 20 meters up and fly home. Also wondering if it's necessary to aquire a new home lock and recalibrate compass when changing out into battery #2, or if it will remember that info from the first battery. Next question: Gimbals? How hard are they to install? I'm looking for cheap and easy as possible to get me better video on my gopro. I heard that you have to upgrade the board and do wiring. I don't need to be able to remotely tilt the camera, I just want the camera to be more stable, will I still have to do the board upgrade??? Or is that only to remotely tilt the gimbal? Thanks!