So Jason, Here's my $0.02-
So one of the things I found out about leveling a Beaver is that some of them come with only 3 hydraulic jacks. So I questioned Why? Why 3 and not 4? All of my SNG trucks have always 4. Was this just a cheep installation? Cheep Manufacturer? I feel short-changed. why not 4? But I found out that the earlier beaver and Safari coaches with 4 jacks (one in each corner) tended to crack the windshield, or sometimes even "pop" one of the windshield gasket due to frame flexing. Cha-Ching!
In my coach, your suppost to drop the coach to it's 'knees' and let out all the air from the bags for storage and longer stays (interpreted: more than just an over-nighter). That has to happen first because the dump valve only operates when depressed while switching the key from run position to off position, which I do.
But I have also realized that I need to drop the front jack first; I think that's even stated in the RVA Jack Manual, or website, or something. This brings the body up a bit, off the front axle for some 'wiggle room' before I attempt to level side to side. This will allow the front of the body to pivot on the center jack side to side, and not be retarded by sitting on both sides of the rigid front axles.
This of course isn't as important if you leave your airbags inflated while leveling, but that causes your jacks to be mostly deployed even before they hit the ground and kinda makes it necessary to have additional blocks under the jacks to get that leveled result. Plus I would expect that the side to side leveling with airbags inflated, may 'over pressurize' the bags on the corner that is lowest by putting more pressure on them. I've just also read the wisdom that relieving the air pressure from your airbags during storage, or longer stays can increase the longevity of the airbags in general. -I tend to agree, Less stress. I know, when I am pressured, I feel stress... ...and I'm not much privy to that.
Hope this helps ya...