okay, so i have been further adding features, trying to figure out how to tension the chains. im not too comfortable with moving the wheels in sliding shafts, so i added a bar of sorts to tension the chain.
the lines represent the chain, and the circles represent sprockets and tensioners. the small circles, the ones that appear to be in the slots, are composed of two tubes, the outer being of HDPE, and the inner of polyethylene. the intent was that a bolt would run through these two tubes, and would be able to slide up and down the slot, in order to tension the chains.