Got my caster increased on my E350

Thanks all. It's a 2015 on a 14 chassis with 2200 miles. The steering always needed correcting. Go around a curve and you had to physically correct the steering. Just staying in a lane required constant steering. That is very tiring after a few hours. Windy conditions were constant work. I haven't weighed the coach but have a good idea of the weight. I use the Michelin guide for tire pressure and am running about 65 right now. I have the rear tires set up with pressure stabilizers/monitors so can monitor the pressures pretty well. The mechanic thought the steering was too tight. That is why he suggested a quarter turn trial adj on the steering box. He said that I should take off the stabilizer before I played with the steering box. It's easy and I could do it while on the trip to try it. If I didn't like it, put it back on. Going to drive it for a while to get used to it.