so I added my first mod today
 

Threw on a semi-permanent upper to lower grill block in about 10 minutes, found out that a piece of 20" flashing worked out as a perfect fit, riveted and bolted to the frame. Total cost of about a dollar.
Drove around for half an hour with no heat issues, we'll see if it helps with mpg
When I get time I'll add side skirting, and a detached rear wing.
There's a guy in my area with six feet of a helicopter wing for sale that should work nicely for the wing

I can't wait to see what you have in mind.:cool: