Koni tech is GTG. I`d only change one thing. You`re already set quite soft, you`re not going to end up any softer than where you are now on a performance handling car. Start there, then do Konis procedure. Why? Because on many lowered ProTouring cars a couple laps around the block with the shocks set at zero may damage the shocks by bottoming out the pistons in the shock body, cut a tire, smack the headers on the ground etc. It shouldn`t but these are no longer factory engineered cars, they`re aftermarket mix and match parts and owner fabricated stuff and may not have factory safety margins for travel and such. I`m just sayin'.
Mark SC&C