i run some fairly aggresive settings on my EK9......
front camber -2.5 deg
rear camber -1.5 deg
front toe 1.5mm toe out on each side
rear toe about 4mm toe out each side
front castor set to full etra +ve with SPC arms
feels VERY good, nice and responsive etc. running alot of toe out in attempt to get the rear end to swing out some more although spring rates are 6k front and 3k rear currently, going to be running 12k front and 10k rear though on new setup so will back off the rear toe out a tad then