I got my new bird about three weeks ago and have been having a great time with it. Two questions: 1) I was flying today, practicing ATTI mode using both course lock and home lock. High wind came up and I was between trees, so to be careful I flipped S2 back to GPS, not thinking about S1 which I left in the middle course lock position. Flight controls were now turned 90%. If I pushed to go right it went back, back went left, etc.. The orientation of the Phantom was the same as when I launched it. I was under the impression that in GPS mode the S1 switch did nothing. Is this false? When I flipped S1 to the top, then the Phantom controls flew as I would expect. I may have started compass orientation rotated 90%, and so does the Phantom take its course lock heading from where you begin compass calibration? 2) The propellers often make a high pitched noise in addition to sound of the prop moving through the air, is this normal. thanks in advance for all the help.