Hello everyone, I'm new here so if I'm posting in the wrong place or this has been discussed else where I apologize however I can't seem to find this issue anywhere. I have a P3 4k here that someone brought me to fix. The P3 suffered a fall from at least 30feet said the guy. The drone works except the gimble. When you turn it on at first it would just grind and not move. I ordered a factory ribbon as well as a roll motor. After installing now everything moves however the roll motor is smashing back and fourth against it's stop. I have watched a few videos and the flat on the shaft is aligned correctly as well as the set screw on the yaw shaft. If any one has any other ideas I'd be glad to hear them. I did try a calibration and an IMU calibration but neither would take.