[aerohead]

Originally Posted by botsapper

There's no turning back, OEM aero is a marketing requirement. Hybrids and EVs are making aero shapes palatable to the major buying demographics. Eco-modders here are applying their garage-tinkering & tweaks to gain efficiency performance from decades-old vehicles!!! So there are plenty of relatively newer vehicles to apply your eco/aero lessons. Hopefully the aftermarket will soon catch on to your aero projects and make it readily available. Smooth wheels, wheel-well covers, aerolids (tm?), adjustable grill blocks, etc. and even boat-tails?!
The K-wing could look good, gain easy acceptance and some real aero efficiency on plenty of applicable vehicles.

Perhaps the boat tail could be marketed as the 'mother-in-law' compartment?