Chris, Thanks for the article on castor and its affects. I had just got off the phone with Scott who was being very specific about the relationships between downward pressure and castor's effect on additional camber through the corners. Also, the amount of toe out caused by that effect with the stock set up and how the stock specs limit the car to maybe 6/10ths.
It seems there is bad information on this board sometimes due to guessing or incomplete understanding and I won't add to that. To avoid this I asked Scott to post in this thread with the mechanical answers based on S2000 R&D. I'm glad to say he said he will try and post tonight to insure members accurate information.

 

I think this result is more likely due to the castor change. Toe out, I think, speeds turn in. The castor is also likely a reason your steering feels lighter (although I don't know how to sort this out from the attachment point changes made by King.)

Castor, BTW simply put is how far the wheel center precedes the suspension attachment center. If you've ever seen a motorcycle with an extended front end you've seen how much more difficult it is to turn. Less castor, less straight line tracking.

I have to admit, though, that my knowledge on alignment has become a little fuzzy. Anyone else?