Hi knd, sorry for the late answer, I haven't noticed your message. No, I used the original setup until I exchanged it for KW V2, which was more than a year ago. But my guess is that changing the springs alone would make a big difference in handling and steering feel. What you could risk is loosing comfort, a well matched coilover setup might do better in that regard. My impression is based on the way my KW with adjustable damper stiffness behaves with various settings. With any setting of the dampers it handles much betters than stock, but stiff settings lead to big sacrifices in comfort, while more relaxed ones not so much.