Think again on mounting bags inboard of the springs. If you can picture it in your mind it is very simple to see why that will help with sag but create additional problems that didnt exist. An air bag mounted inside the spring takes load off the spring and places it on the axle tube closer to the axle center. You now have a big sway issue because its the equivalent to moving your springs closer to center. Think teeter totter.
I dont like bags either. But I hate add on springs, rough riding springs, large rubber jounce bumpers worse. If only I could have two trucks so I'd never have to unload the TC
