Ok I am not an expert on this myself, but when you move the ball stud up or down what it does is adjust your roll center. Up on the car and your roll center moves down, Down on the car and your roll center moves up. The ball stud on the hub will work in the opposite as the car. Up and the roll center moves up and down and the roll center moves down. What you are really adjusting is the angle of the upper link as it compares to the a arm. Adjusting the angle of the link on the car side up does the same as adjusting the link on the wheel side down.

What I have done is drastically change it (one adjustment at a time) that way you can really feel what the adjustment has done. Sometimes if you only adjust by a small amount you wont be able to feel the difference.

Hope this helps

Tim