I worthless on the electrical side.
But I've used notebook paper to set gears in my RC cars. I also roll them by hand afterwards just to be sure but that will usually get me where I need to be. I would think that or perhaps a slightly heavier paper (like printer paper) will do the job. Then grease it up and go! I don't know if it's correct but setting other gears when I didn't have paper has always just been a matter of whether or not it feels like it's meshing right. Nobody ever taught me though. So I could be wrong.
