I think of roll center adjustments as a final adjustment to get the "feel" where you want it after tires, shock package, weight distribution, etc. are dialed in. To get a better understanding of how the car reacts with the roll center stuff, go ahead and make a big change so can easily see what it does. Like run it first with no ballstud washer, then go big like a 3mm washer and see what happens.. Change only one thing at a time when you are learning so there's no confusion. Write down what you learned in a notebook.