Trust me, the underside has not been the only thing I have thought about.
I have thought about about replacements for the front end, front fenders and rear wheel cover also along with a multitude of other additions and modifications. My thinking about all these items has been focused on three different potential markets I have identified.
The first market is essentially hypermilers who want items, such as the air shaping undertray, which are designed to minimize drag and/or maximize fuel economy.
The second market is for people focused on serious performance improvements in vehicle handling and overall vehicle performance which can be accomplished with some handling focused aero mods as well as performance oriented suspension and engine tuning mods.
The third market is for those people focused on vehicle appearance and would very likely include some of the products from the other categories as well as some products aimed solely at changing this vehicles appearance.