Just a little FYI regarding the level low. A few times I have parked the bus and within two days the front end has dropped it's nose. There are no leaks that I can find in any of the valves or front bags. No leans, just low in the front end.
The solution is to once again cycle through the various positions with the level low switch and then go back to the drive position and leave it there about 1 minute before shutting off the engine. Then it seems to hold for probably months with no problem.
It seems like the level low switch is very touchy and if you turn it quick from any of the adjustment positions to drive and shut off the bus, it kinda of acts like the valves don't catch up quick enough to hold when you kill the power.
I don't have an aux compressor, so I hook shop air to the aux tank valve, turn on the key and then play around with the switch positions without having to run the engine. It's amazing how much air is sucked out of the aux tank when trying to raise the rear sides or front. This also helps when looking for air leaks since there is no engine noise.
Now if there was just a way to not get a bath in soapy water while looking for valve leaks.