Simon... if anyone in this forum will produce Q U A L I T Y body enhancements FUNCTIONAL and or aesthetics... it is you...

as far as being a professional aerodynamicist, it shouldn't be that difficult to test out your design with a computer model. there are several programs in conjunction with a 3D modeling program that will help you (roughly ) sort out any kinks before physical testing.

if you are interested in any of the programs, let me know... i can duplicate
and send it off... if so PM me with your computer's OS.

i've seen your PT cruiser work and whatever you have posted here about the XF and your involvement and dedication is beyond reproach...

josh.