You are a brave man! At Thunderhill, I have no problems running a more neutral set up but Laguna Seca with all the close in walls, it can be really scary. In a previous car, I've seen a friend of mine go sideways into a wall before there while I was behind him. And I have lost braking going into turn 2 before, ending up going in the gravel at 60mph and stopped only 2 feet from the wall. I guess because of that, I tend to drive more conservatively at Laguna Seca.