Try 1.5 to 2 degree negative camber on the outside front - you might get better turn in. You might also want to go with stronger springs on the outside - all of the weight of the car transfers out there during the corners and leaves you no play. With silvers you are probably bottoming out the outside during the turns.

Does anyone else at the track run a TC4? Settings change radically from track to track even on carpet so if someone else has a setup that works on that track it would make a better starting point than starting from scratch.