Originally Posted by yud
Not sure how this will help. There is nothing to secure with a zip tie. The only unusual movement is the blade + hinge, which move up/down about ˝mm more than the other blades. Otherwise the motor has no other play/movement which can be secured with a zip tie.
Maybe I'm not understanding what the blade and motor is doing.
Looking at your pic a zip tie wrapped around the cracked part may help pinch that crack tighter against the tube so it wouldn't flop around when activating the motor.
If that silver elbow is not really moving but the shaft and motor are out of line, maybe the shaft is slightly bent.