Hello everyone. First, a little back story. I picked up my Phantom 1 from a buddy that was upgrading to the Inspire One. The only thing wrong with it was the GPS was not working at all. Long story short I replaced the GPS and flew it successfully. Last night, I was flying in the backyard no more than 4-5 feet off the ground, just getting a feel for the new hardware. Then, without warning, it throttled to max and shot away into the sky. I stood there dumbfounded for a moment before it fully sank in what had just happened. I immediately cut off the transmitter (A bad call, I know, but it was all I could remember for initiating RTH at the time) Of course, nothing happened. Luckily, I had set my max altitude and distance earlier with the Assistant and limited it to 60 feet. (Pretty sure this is the only thing that saved me from losing my toy) It hovered nicely before starting to drift away on me. Still in a bit of a panic, i flipped the controller back on and toggled from GPS to ATTi mode. Finally I got some response out of it and started to bring it home. In my haste I sort of crash landed on the roof, slid off the shingles and some how managed to dive across the backyard and snag a landing gear leg before it hit the pavement. Now that I've got my heart rate under control and have sworn off flying in my backyard ever again, what went wrong?? I assume it was GPS interference and have already started looking into the various shielding methods, but I'm still unsure. Was it interference with the 5.8ghz? (I kinda lean towards no, because it behaved normally once toggled to ATTi.) Was it a badly set Home location? (I let the drone set in the yard, in clear sight of the sky for a good 5-10 minutes. Should have been plenty of time to set home lock) I'm extremely leery of flying this thing again until I understand what happened so I can do my best to avoid whatever it was. Any tips or advice would be most welcome.