I have a Monaco with the 3 jack system. They use a 3 jack system to prevent windshield damage. The frame, a "Roadmaster" on my Monaco, does not "Flex", that is what the air bags are for. I found that my leveling system, when allowed to run in the "Auto" mode, raises the coach to high. It actually wants to lift the rear wheels off the ground. I use an 8" carpenters level on my galley counter tops and operate the leveling system "Manually". I raise the rear jacks to get the bus level from left to right, then raise the front to level front to back. It has worked perfect for years. As for the door, is it always hard to close? I had trouble with mine when I first bought the coach. There is a support that runs diagonally in the frame of the door. If you look under the door, on the side opposite of the hinges, you will see a 3/8" nut on a long threaded rod. Turnning that nut clockwise will raise the door on that side and should make it easier to close. The doors "Sag" over the years and require adjustment. Hope this helps............ Ron
