Twin axle levelling

robjane

I was reading on this website or the "other one" yesterday, about a levelling system for single or twin axle vans. It comprised of one or two blue air bags that were driven onto and inflated, thereby enabling alko locks to be fitted easily, and also could
be left inflated as a levelling device. Price £120/130

Problem is, I can't find the article again, anyone got any ideas ???