I have a part assembled in a joint that only allows it to rotate. I want it to be able to rotate adequately using the joint as its axis of reference but every time I try doing something to get it to rotate, it somehow leaves the joint and does a random rotation in midair I didn't want it to do. This is my first trying to get a part to move and I really don't know what I'm doing, but it should be able to move fine without it leaving its joint. I attached a screenshot of the assembly and I also attached the parts and the assembly files if anyone can work on it.