The owner of the company and designer/co-designer of the car seems legendary for his attention to detail; I'm surprised about the downforce issue. Car designers seem to almost always overlook that only half of the air is going over the top of the car as it drives...the other half? Under the car! So the underside is almost always overlooked on street cars, when looking to decrease drag (and there's a ton of very un-aerodynamic junk down there).
Just thinking out loud at this point mind you... I recall the last-gen 300zx had specially designed wheels that were made to suck air out from under the car... and F1's make so much downforce they can drive upside-down at speed. Ages ago I was a mechanic for a shop that specialized in Z-cars and also built track racers besides the street stuff. One of the "bibles" of race-prepping Z's had a photo of a 240z with and without a front spoiler. Without, because of its airfoil shape, the car lifted about four inches above normal ride height!
Wonder why the otherwise immaculately designed CCR would overlook something so obvious, considering it's -made- to go that fast.