I had a Safe T Steer installed by Henderson's in Oregon and watched them do it. They "eye-balled" getting the wheels straight for the initial install and then we went on a road test. We agreed that we had a bit of a pull to the right so stopped in a parking lot and I got under the coach to watch him adjust it. He loosened one Safe T Steer bracket only enough so he could rap it with a hammer to move the bracket only about 1/8" or so. He then tightened it and we road tested again and it appeared perfect. I think it's a bit of trial and error with these things.
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD