It costs about $6 grand. If you are generally willing to make this expenditure to improve the ride I would assume that installing a tear trac bar and doing the cheap fix would be on your list. I also added a steering stabilizer from road master for safety and handling. For me it was important to improve my handling and ride. I can now survive on the worst roads, drive in the wind with confidence and ride comfortably on normal roads without trouble. It was worth it for me and I had wasted money on other coaches I have owned seeking a solution to ride issues. You can improve by careful monitoring of tire pressure and better shocks but the Kelderman is the best..
Baithouse? Have you obtained any new info on the age of your coach/chassis and the install directly from calling Kelderman.