Manufacture of TFTs corresponding to various circuits makes structures thereof complex, which involves a larger number of manufacturing steps. The arrangement includes a ball mount that includes a tongue portion having an aperture for receiving a securing portion of a hitch ball and that includes a mounting portion for insertion into a receiver located upon a vehicle. The at least one device can operate in at least two modes requiring different resources. Optionally, a conductive layer may be deposited on a substrate in the multi-level waveguide. The weakly basic polymers are water-soluble and cationic at acidic pH, but neutral in charge at basic pH.