the way i have been doing it is, i will have the enpoints set in a general area. I then turn the car off. I turn the tires with my hand to the left (or right) where they stop snugly (without forcing it). Then grab my transmitter and turn my wheel all the way to the left (or right). Then i will turn the car on. If it turns more to the left i know my endpoints are to far. if it goes short i now i can get a tic or two more. And i always set it a couple of points below just to be safe.
does that sound like a good way to do it? No problems here. Just curious, since i have never asked (until now)