Sorry, I didn't mean use Chucky Cheese tokens on a permanent basis, just to have a known .984 token so I have something to compare my tokens to, and to see if they work on my mechs. I don't think the tokens are .900, because they are definitely bigger than a quarter, and .900 would be smaller. They are not a full 1", plus they don't jam when I put them in, so I don't think they are 1" either. I'm pretty sure at least the diameter is correct, but what I don't know is if there are different weights or thicknesses on .984 tokens that may throw the mech off.