The stabilizers aren't to be used to level the RV. Neither are the scissor jacks.
It's not the device that's the issue it's the stresses you put on the frame if you try and level using the corners. You should set up level sitting on the tires then snug the stabilizers or scissor jacks to the ground/pad.
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!