I'm working on getting my new Four Winds 26b loaded and ready for my first big trip (about 1000 miles). Will see how it handles. I'm expecting it to handle about like my truck with a slide in truck camper. I found the decal in mine that says an alignment was done at the factory but another one may be beneficial depending on how you load your vehicle. Only aftermarket I'd likely consider would be Airlift 5000 bags with dual controls and onboard air pump. Worked wonders with my truck camper.
P.S. You may want to check the wires to your control center by looking through the cabinet beneath the sink. I found mine dangling down and were being snagged by stuff in the top drawer. I installed a screw along the top beneath the sink and used zip ties to pull them away from the drawer.
Roger, Dawn, and Roxie