I have an idea, not sure if it's been done before or if it would even work. What about deleting the system but running a new dorman compressor still hooked to the leveling valves but hook the compressor to the air lift bags in the coil springs. I was kind of thinking with the raised height of the new coils it wouldn't need to level it self out but I do have the aluminum leveling valve arm extenders, so I could set my own height on the rear. I know the air shocks vs the air bags operate differently, but you'd think with my trailer on it would sag somewhat, and the compressor would kick on and level it. So I'd essentially have a deleted suspension but still retain the auto level... Thoughts? Another thought is like you said swathdiver, what if the compressor over inflated the air lift bags, and blew them...
I too ran helper bags in my 2006 GTO when I had it, to control rear end sag and to keep the fenders off my DR's when I was at the track. I like them and know they work, just so undecided on deleting vs keeping the system somewhat stock...