I just bought my 28A in March. When bringing it home I thought that it wandered a bit more than I felt it should. Took it on a trip to Luray, probably close to 350 miles round trip, all good roads.
Steering was horrible, the line in the road would cause it to wander.
I have been a tractor trailer mechanic all my life, this is an alignment problem. I know the Ford steering is a little more touchy and apt to wandering a little. After all look at all the overhang past the rear axle.
Today I had the front end aligned at a truck spring shop that I deal with...Its not the same motorhome. Oh yeah the motorhome only has 4000 miles on it. My problem was most definitely alignment.
Camber left before 1.6 after 0.4
Right was okay
toe was out slightly brought back to 0