Bringing this to the top to add specs.
My search for write up tips brought me here.
I bought the Chase system today and talked to Mike at Rockstar Trux about the same question.
Though KORE builds them for stock specs, the static caster will change when lifted, due to the link configuration.
Mike's reccomendation, which is second hand from either a dealer tech or a KORE tech, is 2. 5 to 3. 5 degrees, possitive.
Eccentric bushings are on the axle side lower links for adjustment.