hi, ive been flying my phantom2 for a couple of weeks now with no real problems, it performs well in flight with no real issues, however i do have a couple of questions, first of all no matter what i do it seems impossible to enter compass calibration. i fly it in naza mode 3rd position as f/s, i have tried starting at 1position and 2nd position, i have tried waiting til imu is warmed up, i have tried in phantom 2 mode, i have set 3rd position back to atti, still the same nothing works, in the assistant software the compass values are fine, im just worried as i would prefer to calibrate every time i go to a new site, has anyone had this problem, i see posts for failed calibration, but not this problem, also i have checked the switch in the software assistant and it works perfectly. the other thing is i have a rattle coming from what appears to be the orange phantom reciever, is this normal, like something to do with the gyro etc, any help would be appreciated cheers