I’d like to add airbags to my rear suspension on my Ram 2500 diesel to level my truck when I’m towing, but don’t really feel I need to be able to control them from the cab and don’t want to go through...
I have the Firestone bags on my 2001 Cummins dually with a 3000 lb. pin weight and have the manual schraeder valves for each side. I put in about 50 psi for traveling and let it out when not towing. I carry a lightweight 5 gallon aluminum air bubble, and it works great for adding air to the bags. Fill it to 120 psi and it's good for 4-5 fills.
Never really felt the need for the cost and complexity of the onboard compressor.