About the air bag pressure, I added an air gauge in the cabin and plumbed it into the air bag system. Since my Firestone Ride Rites are plumbed together, it only took one gauge.
For about 50 bucks, it sure is a comfort seeing what the air pressure is at all times, and now it's a lot easier determining what pressure feels best for any given load.
Another thing I did was to add a platform for a large tool box on the front hitch. That box is low enough to not cause vision, air-flow or engine-heating problems, and it allowed me to put about 150 pounds of heavy tools on the front end, where a little weight is beneficial to compensate for the weight imbalance caused by behind-the-axle overhang.
