Your first springs were probably way too soft with less than the stock number of leaves. Air bags are really only to adjust ride height. Mine are plumbed individually with individual fill points, so there's no air transfer between them and no sway. But of course I still have the stock springs with overload leave that engage on suspension compression. I do have to adjust them each time my load changes, but that's not a big deal - 3 or 4 times a year.
Correct. The bags were just a stop-gap. Originally, they were plumbed separately with 2 schrader's mounted in the bumper.. Then I installed the pump in the engine compartment and adjustment valve in my cab. No real way to separate them then.
