I just purchased a used Grandin Road Frankenstein monster that worked fine when I tested him but when I got home he only lit up and moaned and didn't rock from side to side . Upon further inspection , I must have jammed him a bit when strapping him into he bed of my truck. There is a threaded rod that attaches to a motor arm that makes him rock from side to side. I can seem to get the threaded rod adjusted to the proper notch. Does anyone else w this prop have the instructions that tell you how to align the length of the thread rod or do you have a trick to align it properly. Just when I think I have it , it hangs up and stops and two o'clock position as the motor arm rotates counterclockwise.