I can’t comment on the unsafe condition that van was in, but the point needs to be understood that not all installers of air suspension systems “butcher” the chassis.You have it spot on , a damping adjustable s hock the same length as standard is the answer , If i recall the VB air has alco shocks ( not well known ) the Koni damper i am suggesting will be streets better . Bigger ARB will not affect comfort BUT wont help you issue either they only function in corners
They are easy enough to make , but if VW had them surely the £8500.00 would have been a little more realistic ?? the bump stops are approx. a tenner .
Please note i didn't get a quote from VW, the owner of a van who was suing a guy for supplying a van butchered at the rear was. He was asked to get a quote from VW which he did £8500.00 . We had already repaired the car, but the new owner was not a happy Chappy that the rear was left in an unsafe condition when he purchased it . .
As I said earlier, any van to which I fit air can easily and safely have a conventional rear spring fitted without the need for any rework. Simple rework can be done to the van to bring the bump stop back to 100% factory.
I don’t think it’s appropriate to generalise as you did previously, using a one off £8500 quote to attempt to tarnish all air installs.
I also can’t comment on the reliability or after sales support of VB systems, but I do know that the reliability and after sales support for the systems I fit are outstanding.
A well installed, well considered air suspension installation isn’t something that should be feared. Done properly, using the right kit and serviced annually, an air suspension install should provide years of trouble free service.