I was wondering if anyone has tried this. I am wanting to fly my P3P while standing on a steel roof. I would calibrate and launch the P3 from the ground. But be standing on a metal roof with the controller. Its a big pole barn roof so we're talking 50x100 ft or so. My objective is to get another 20 ft or so in the air to get better line of sight for a couple places I want to fly in the area. The only issue I see is maybe the metal roof throws off my tablet compass a bit.