One more thing you might try. On my 88 Itasca E350 I used to set my own tow in to an extra 1/8" in to the front of the vehicle. Upside is it handled much better especially while towing. Downside was some extra wear on the front tires. I'm not sure how much different the new front ends are but the on old Twin-I beam front ends, the tow in used to move in and out quite a bit as the front bounced up and down. The little extra "Tow In" seemed to help. I decided I would live with the extra wear on the tires for the better handling.