wall-e suffers from a head shake. this happens when I move his head(up/down/left/right) and when I drive him around. i'm going to be showing him to 600+ people Monday so I really want to figure this out. his head shakes back and forth(side to side). I was thinking... if I put a mid tension spring on the area where the servo mounts to the head and attach it to the body, it would help stabilize the head, would it not?