I now have the Daystar airbag cradles installed. Normally the airbags are secured at both top and bottom. But the airbags don't have near the travel as the rear suspension. If the axle droops it can tear the bags or bend mounts.
With the truck frame on blocks I lowered the axle enough to do the work. Clearly shows the gap and the axle is NOT at full droop. Spring side bracket removed in this pic.
The cradles catch and hold the airbag in a cup.
Contact!. I raised the axle a little and added a little air to the bags to get everything touching and lined up before tightening up the lower mount.
I took it for a test ride with an empty truck and my normal empty setting of 6psi in the bags. Everything seemed fine and quiet. Today the camper goes back in the truck!
Squatch, thank you for the scientific approach, pictures and sound methodology. helped me. I did a lot of web surfing shortly after Airlift support told me max 4 inches of abrupt suspension travel or death to bags. I found a long thread from 09 to mid 2016 on a Tundra sight somewhere on earth. after i sorted out the posts, the unanimous conclusion was positive. and I priced a spare bag at 120 $ now on to the little compressor search. thanks again for the good pictures.