Kenny,
No probs, I would hasten to add that mine is a 1400kg road car, but gets used to excess on track / Nurburgring (in fact we're there on May 20-23rd, so if you want a ride round, you know where to find me ), but I doubt if you brake harder or later than I do (although you are probably a better drive) .

The reason why your car understeers (or any Cossie for that matter) is due to the different roll centres that the front and rear OE suspension set up has. This means that the rear is always trying to push the front wide . Fitting harder springs will NOT rectify this. The only way to do this is to fit a different (6°) rear beam, which removes this trait, as well as allowing you to dial out the inherent camber and toe-out problems that are caused by the standard rear beam.

Personally I see your wet settings being even too hard for the dry , but I use Dunlop Super-sport Race tyres and not full slicks.

Do you know what geometry settings you are running or corner weights etc?