First I know there are a million articles on the internet, that tell you a million ways to set these up.
Have any of you actually done it? Half the articles start out making sense, and then trail off into NASA science land. My angles are -5, -4, 1, 4. The rear is loosely bolted in, so I can set it to whatever, the common consensus for the dummy version seems to be set the rear to +5 and keep shimming the carrier til the vibration stops. As many lowered duallys as there are you'd think there would be some more precise info, but nope.