Originally Posted by BendOrLarry
I see the situation a bit different than you do. By driving up on a board to counter the frame roll due to the weight of the extended slides, you are still allowing the frame to roll. It seems to me that a jack located mid frame on the slide side that was lowered while the slides were retracted would then keep the frame from rolling putting excess weight on the drivers side springs. I am going to try a scissor jack mounted to the frame I just posted this to see if anyone else had thought of doing the same thing.
You are right we are seeing this problem from different angles. I don't see it as your "frame" rolling to one side because of unbalanced weight distribution but as your suspension being more compressed on one side due to the unbalanced load.
I don't believe the problem is with the frame moving/twisting at all. Which is why I recommend against putting forces on the frame to correct a suspension loading/unbalanced problem.
If you raise the wheel(s) on the side that has had its suspension more compressed then the frame will be parallel again (level side to side). Or pump up the air bags on the low side and lower the air bags on the high side.
Another way I look at this is one sides wheels has an increased weight load while the other sides wheels have decreased. So you have two forces at play (compression distance of loaded side plus the decompression distance of the now unloaded side). If you start jacking up the middle of your frame enough to counter act say 1 inch of off level, that part of the frame now would be bearing the load that was once shared between all four corners before you deployed your sides after initially leveling. It's not just 'taking the weight off' as now weight that was once shared between 4 points (by some percentage ) has now been shifted to say maybe 2 points... Plus now the other side has risen up due to the shift in loading.