I've just up-graded to a 1996 9'10" Lance Squire slide in camper, and it's much heavier than my old Northland 8'. With the airbags, and my spring supports, the truck carrys it OK, and the mighty Cummins just growls a little deeper, but it seems like it needs more shock control than the Rancho 9000's give it, even set on "5." Is there a really big RV shock that'll fit, or is there a dual shock kit available that I could install ?? Welding is not a problem. Lar.