sorry doogs probably should have mentioned that what I suggested is probably more for stiffer springs.
I run on mine 1mm total out front, max castor, neg 1 per side. rear 3mm total toe in, neg 1.5 per side. its quite nice on the street. I have 2.3kg front springs and 4.6kg rear springs with 18mm swaybars both front and back.
so to answer you question I run neg 1.5 on the rear instead of max because the body roll is not as severe with stiffer springs so the camber change on body roll is not as great.
I found tyres wore very very evenly all around. front end grip was fine. more just lost it due to super**** spec front tyres.
For track/weekend I would deffinitly up that front toe to 2mm total out and I wouldn't personally run more than neg 1.5 on my suspension setup. rear I would probably leave about 3mm in and would up the neg to 2/2.5 per side