I added the airbag leveling system when we bought our 03 Contessa in 09. When we used the jacks for leveling, as soon as some weight was put on the front jack, the entrance door would bind. Being familiar with Monaco's 3 jack sysem and the windshield problem (we had a2000 Diplomat with windshield problems) I had HWH install airbag leveling, $3800. I'm real happy I had that done. No more putting boards under the jacks to keep from putting holes in the asphalt, no more binding entrance door, no more worry about the windshield popping out or cracking, just push the button and level.