@GM MUSL great info, thanks.
Do you keep track alignment on the street or switch before/after each track day?
I am thinking of starting with street specs and switch to track alignment if I see the need. One thing I am worried about is that I felt very comfortable pushing at Spring Mountain, the car felt amazingly predictable and easy to drive at the limit of my abilities, and I don't want to end up with a less amazing car because of street alignment.
I could probably live with track alignment on the streets and accept the accelerated tire wear. I guess tires will wear out quickly anyway if I do any significant amount of track racing.