can I install these on an older KitFox that has an old panel layout? (Sorry, i'm somewhat naive to the inner workings of panel layouts) A used (cheaper) kitfox is an option until I have the time to build my own to the spec I want, I can live with an older/used one if I can get satelite radio. Sort of silly I know, but I'm a young guy that listens to a lot of music... just what I'm looking for. thanks for input N981MS/Geowtiz