On a serious note, I would like to see how @
dOMEmE 's preforms. The exit angle of the center section does look pretty steap, any idea on the angle? I've had issues with an 11° diffuser angle not performing well, on a true flat bottom car, where reducing it to 7° worked much better. Over 7°, unless it's a conic shape, generally has too much flow separation, and chokes the diffuser, from my experience.
Might I suggest @
Wonderbar and @
dOMEmE take this to A2?
http://www.a2wt.com/ the modern version of the bike rack, after school? lol