[Richard]

Just to add a little to the mix. It was amazing to me but the airbag will seal airtight when inflated fully. And deflate when the coach is lowered below travel height. That behavior is consistent and repeatable.

I had one of the old airbags off my coach which has the same model number. The center plug on that air bag is 1/4 inch recessed from the bottom plane of the outer ring. On both of bold air bags the plug is flush with the bottom plane of the ring