As a tech I figured I should reply. Caster is mostly a stability angle and usually not adjustable from the factory. Hence the cradle adjustment. Caster is most felt when straight line stability is needed, a car with out of spec caster could wander or in extreme cases cause a pull but will not wear tires. So long as the car drives straight and true, and all the other angles are right on, I wouldn't worry about Caster unless it is out by a great amount.
Hope that helped.

__________________
--Justin
-2000 Dakota R/T Bolt on's and a built trans
13.5@102 Motor
12.2@110 150 Shot
-1995 Honda Civic Built 1.6 Single Cam on 15PSI
13.6@111
-2006 300C SRT8 Diablo, 275 Vreds, 176 t-stat, and Magnaflow High-flow cats
12.3@113