I think what you are talking about is how much do you turn in or out the tweak screws to adjust your tweak. Correct? If that is what you are asking, start with both rear tires at equal diameter and both front tires at equal diameter. Next, with the batteries out of the car, set the car on a level surface and back the tweak screws out until they are no longer touching the chassis. Next, take a very thin strip of paper and place it between the chassis and the tweak screw. Turn the tweak screw into the T plate or down towards the chassis until you feel drag on the strip of paper when you try to pull it out. Do this for both screws. Now turn the tweak screws in about 1/4 turn and you will be at the perfect starting point to tweak your car. Providing that your fiberglass T plate is fresh, you can tweak your car either with a tweak station, four scales or with the tried and true coin drop method. Remember that you do not have to turn the tweak screws very much to adjust the tweak. Turn them in 1/4 turn increments and if you go over 1/2 turn on one screw, back the other screw out at least 1/4 or you can stress the T bar where the tweak screws thread into the T bar.