I was going to spec it out on the 3500 I just ordered. But I plan on using it mainly to tow my 5ver around the country. And if it should every go bad, I'm screwed as the leafs on the truck could not handle the pin weight, not to mention that if just one side went bad it would shift the balance of the load. The traditional set up is bullet proof. I mean Ram has been talking about this for years. Supply was not an issue, as you see Firestone bags on them. The system should not be that complicated as air ride has been on cars since the 70's. So that lack of confidence and taking so long discouraged me from ordering that option.