Air blades.

[Bluezone]

Well I tried installing a flat under tray made out of coreplast(?).. I've got to get it held in a little better but it seems to work fairly well. It's a bit droopy after taking it for a drive.
Also tried smoothing over some potential drag spots with a temporary fix on the grill and reduced opening.

 

[Bluezone]

Made several test runs on my usual route with all the aerodynamic models. Couldn't get consistent results due to too much traffic. So here are three runs close together and one from the day before.
Remember these are different weather and wind conditions then my original runs. So judge with a grain of salt.