So I have the opportunity to pick up a slightly used set of coil overs for a couple hundred bucks. Does anybody have any experience with Koni's? I've heard that they are only worth if you take the time to tune them exactly the way you want. What all does "tuning" exactly include? From what I've gathered there are two simple adjustments, the first being a knob located on top and the second at the bottom which can be adjusted with a wrench.