I don't think it's a silly thing. My 65 Dart is my daily driver (except when the snow hits) and early in the morning when I'm driving to work and it's cold or raining my back window would fog up. My car had the FACTORY cut outs, two for speakers an the middle one for for the rear window unit so I bought one from "65dartcharger"(thanks again!) and installed it in the stock location and it works great!!!