My Dutch Star is equipped with the patented BI-AXIS HWH 4-hydraulic leveler system. You can NOT lift just one corner of the chassis. This system works the levelers IN PAIRS. The front 2 are paired, the right 2 are paired, the 2 rear are paired, and the 2 left ones are paired. With this system, you are assured that their is no twisting force (torque) applied on the frame during, or after, the leveling procedure. That's the reason it makes sense to deploy the slides AFTER the leveling,....and to retract the slides BEFORE you retract the levelers.