Ian,
They squeezed out way to many variants of the Elites to even be counted. They all pretty much worked the same simple way and looked the same under the hood. Hoover managed to put both hard and soft outer bags on the machines but they all use style "A" bags. You can also sorta mix'n match the parts to build "franken-elites." LOL. My favorite in the Elite series was the Hoover Elite 200/TurboLite.