I went through my first driver training/performance course this weekend. One of the elements was a run through a road course about a mile long -- with no straightaways at all. All curves. The 328 was really pushing hard, as if it had no grip on the front end. I'm running Portenza PE730s. Those are mainly street tires, but it should have stuck better than that. Instead, it was if my steering input had no effect at all for a while, and then kicked in hard and whipped the car around. Pressure is 30 all around, no mods on the car. They are wearing normally and didn't show any signs of rolling under after the sessions. Suggestion to bring it back to a more neutral feel? More air, less air, 200 lbs of sand in the front trunk?