The September 2010 edition of MotorHome magazine has an article about a new type of suspension called SumoSprings. They are an airless air bag designed to give a much smoother ride, less lean, sway etc. It comes in kit form and looks like most Barthites (younger than me) with a few tools and a couple of hours can have a DYI project. The magazine article shows pictures of the kits. Google up SUMOSPRINGS and see if you are interested...................

Here is the website for the parent company - SuperSprings:

http://www.supersprings.com