i have a raptor 50 with a tune hitori pipe ,a os 50 hyper motor, this machine can hold a rock solid hover, it barely move with hands off. my problem is when i give it full throttle on a upward decend it snap and the nose rolls to the right and then a couple seconds later it torks to the left can any body help me .other than that she flies perfect. i was wondering is it the rudder servo im using a futaba s9250 on the the throttle im using jr ds8231 on the elevator and jr ds8231 on the aileron and nes 4131 futaba gy-401 gyro jr 8103dt heli verson radio.