I notice that if the spacing between the knuckle and the edge of the arm is large (much of the pivot ball can be seen), then he would be using UTI or UBI upper insert position which is the long upper rear arm config.

If he uses the UTO or UBO upper insert position (short upper rear arm config), you will notice that the spacing between the upper knuckle and the edge of the upper arm is very small because you need to turn in the pivot ball to get enough camber (-3 or -4) and at the same time maintain rear trackwidth. Just from my observations...