Here are a few things that may help from loosing calibration. Be very carfull of static electricty in your body. Make sure the shoes you whear do not cause static e when walking on carpect...ect. I also found Endust spray for computers helps to keep this static e away. I had a snap from my hand to Transmitter (static e).... and lost all calibration. A ground wire may help to. Might have to put grounds on everything!!!! Man this AFP Deluxe is FUN...and I an not crashing near as mutch!