Hi, The following issue is bothering me: All 4 motors at idle mode except one are turnig at about 1580 -1600 rpm . The exception is one motor: It turns at 1260 rpm. I have replaced it but with the exact same results. That makes me to believe that maybe is an esc issue. This is happpening from day one I bought the Phantom 2 . Until now I have more than 120-150 flights with no flight issues at all. But I cant stop bothering if something is wrong and in the long run a flight disaster due to a faulty esc happens. Any opinions or advise ?