I might be under thinking the handling situation, but I have done nothing to the coach other than inflate the tires to about 100 psi (as listed on the tire), though they are down to about 90 psi after several months. The coach is subject to wandering when large vehicles pass and in cross winds, and it sways when pavement of different elevations is encountered.
I keep in mind that the RV is a large, slightly top heavy vehicle, with a relatively short wheelbase and it will never handle like a pickup truck. One indication of proper alignment and proper tire balance is tire wear, particularly front tire wear.
I wonder if PEHetzer discussed the caster angle with his front-end alignment specialist? Insufficient caster angle can result in wandering and instability. Caster angle can change on a loaded vs. unloaded coach.
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