Finally took the rig and had it weighed, set the front at 55 lb and the back at 60, could have gone a little lower but the rig wasn't packed for a trip so went for the higher air. It was still wandering so we had an alignment done. The caster was only 3 so he bumped it up and the front wheels were way off, apparently it wasn't aligned when they put the new tires on. Now it is driving great, not so much correction.