Aurora had a plunger style and design during which a stack of carbon/silicon discs changed the rheostat. Less typical variations bundled a horizontal thumb-plunger and a complete-grip squeeze controller. In 1965, Russkit released the trigger-operated pistol grip controller. The pistol grip speedily grew to become the common rheostat-controller type both https://johnnieg174nps3.plpwiki.com/user