Jim, Yesterday Bill at Performance alignment checked my C4S for wheel balance and alignment....I gave him the e-mail you sent me regarding the camber adj. which he did. What was interesting....I complained about the ride with the ContiSportContact2's on my Porsche, versus the ContiSportContact3's on my NSX, and when he was balancing, he said the right rear wheel was a "road force 45", and he said they should always be below 18. I had never heard that terminology before, but after Bill did his magic, the ride is unblievable!
By the way, he ended up switching my right and left rear tires, to get the road force to 16...
I talked to Dave Proffitt at Porsche of the Village, and he said they also use the road force balancing now...evidently it's new in the last 5 years!