Hey Phil!
You should bring your car up sometime so we could tinker together. I have some leftover sheets of plexiglass that we could maybe find a place to use on your car. I haven't tried smoothing out the bottom of the car yet, but I would love to try. Covering the wheels seems to make a big difference if you think you can put up with the look
A ton can be learned about driving technique too. And I totally agree with Brucey, half the battle is learning to conserve momentum and energy already put into the car, which doesn't necessarily mean going any slower.
Brandon