I played a lot with three motorhomes and better ride. First tried Mor/Ryde. Didn't do much for me. Then Koni shocks. Big improvement.Then Kelderman, improved some. Then went to 38 foot gas coach-big improvement. I did all the tire things etc but the big thing was the greater weight of the coach. I think the smaller coaches don't compress the springs enough and Kelderman changes a spring on the front to a softer one. So I say Koni shocks and load your coach. It will ride better. The sumo springs or non springs make me curious.