Randy, completely agree with your suspicions that I have too much grip. When I first got the S400 I went looking for grip. To get the extra grip I have;
Raised the front roll center 0.6mm front and rear
Raised the rear roll center 1.0mm front and rear
Changed to the UK top deck
Moved the rear shock out to the furthest hole on the bottom rear
Changed to 2 degree front hub carriers and narrow hexes on the front to to get more turn-in
Do these changes make sense for more grip?
At the weekend this was good but as the temperature came up and the RP30 tyres that I was running started going off at around the 20 lap mark due to track temperature the car actually felt better as it was a bit looser and I was doing my fastest laps.
I realised looking at my car that I had already lengthened the front camber links at the weekend and I am going to try the top deck comparison, the anti-aquat changes and the other things you suggested to see I can get more corner speed/steering.