Gil, my Contessa pulled left so badly that I wore out the front left tire within 5000 miles. I had the coach "aligned" when I purchased it, but after wearing out the tire, I took it to Josam and found the tag axle was terribly out of align, with both wheels pointing right, and the drive axle splayed out on both sides. The tag was actually steering the rig. Josam aligned all three axles, and now I can literally take my hands off the wheel and it will drive down the road straight. The technician told me that almost every motorhome they work on has problems with the rear axles. His explaination was that the motorhome manufactures buy the axles from suppliers, then weld their own suspension systems to the axles. They apparently don't take the extra step of cooling the axles down slowly and so they deform. Josam locks everything down firmly, heats the axle housings, gets everything lined up, then slowly cools them while holding them straight. It was impressive to watch.