Hey! I have a Jason and a Ghostface who need work on their arms. Jason's arm gets stuck and I have to move it to get it working again, and Ghostface's arm is slowing down as each year passes, and will eventually need a new motor. My question is, what gears do these items use on the end of their motor shafts? Are they your standard 8, 9, or 10 tooth gears, or are they something bigger? If they aren't, I'd like to know what they do use, so I could potentially replace them if they break.