I could have made a lot user selectable, added bluetooth connectivity (or CAN, I suppose), allowed uploaded maps, etc. But I wanted to concentrate on keep it simple plug-and-play for two reasons. First, the majority of people who own these cars don't want to fiddle. Their car died and they want to just swap out the unit and go. Second, I had some trepidation about the Clean Air Act of 1970, which basically says "don't screw with emissions". If I made it too easy for people to "play" with ignition maps, I was worried I'd be in violation of that law.