I used to screw them in till them bottomed out, then used digital calipers to match them side to side. Nowadays i screw them until they are even with the shoulder of the shock shaft, just above/at the top of the threads, then make them even side to side.. At least its consistent this way. Similar to gluing tires, i used to only glue the bottom bead where it meets the wheel.. Now i glue all the way where the wheel meets the bottom of the sidewall for less tire deflection. Not that one way is better than the other, i like the consistency of doing these 2 things, among others. You see guys tweaking their buggies for hours at the track for a reason.