My dad and I have been flying his GWS slowstick since Fathers Day and It has worked fine until here recently.. Now the motor will very randomly cut out even If the batteries aren't anywhere near dead...Even if they just got off the charger! I know it's not the batteries because I have cycled them several times off the plane and more times than I care to count on the plane. He's getting perty good with the Stick And I taught him to loop it (1 so far) and I've worked with him on low and slow fly by's and he hits the drive way or road every landing often with 1 or no bounces.(I outfitted it with foam tires). So It will become a lazy sunday flyer for him soon and i want to get him another plane.. Low wing faster.. But I can't figure out how to get rid of this problem where the motor randomly shuts off.. Now somtimes it will come back to life sometimes not.. Can someone please help?!