Hey guys, Had my P4 for about 4 days now, and i'm loving this this thing. just a couple questions for the more experienced among us.... I stumbled across this article..... 10 things that could save your drone | Paul Joy – Freelance Filmmaker Now everything I've read up until this point indicates that we should calibrate the compass before every flight, which i have been doing. So i was wondering what "the more experienced among us" think about the 1st point this guy makes in his article, "1. Know when and when NOT to calibrate the compass" Can some of you share your opinions of this? Next....Point 2 he makes..."2. Know when and when NOT to calibrate the IMU" As far as i can tell, the P4 automatically calibrates the IMU when i power it on. Is this correct? lastly point 6 he makes...."6. Switch tablets and phones to Airplane mode" i've read that leaving wi-fi on is okay (my ipad is wi-fi only, but i'd like to tether it to my iphone's data connection for testing out the live streaming to facebook or youtube.....and i think that happens via a combination of wi-fi and blue-tooth) those are my only dumb questions for right now...........oh wait! one more...sorry! Yesterday i was in a new location i never flew before, and was trying to calibrate my compass, and was getting a message that there is magnetic interference or something of that sort....happened a few times, and then i realized it could be my apple watch band b/c it has a magnetic clasp. After i took the watch off, it seemed to calibrate just fine, but i'm pretty sure it worked the other times i've done the calibration wearing the watch. Maybe i was just holding it differently this most recent time, but not sure? I'd love to hear some thoughts and get some advise on these topics! Appreciate it, this forum is awesome. here's a shot from my flight yesterday evening!!