I run mine down snug to the ground to keep from walking around inside the trailer and getting wiggles... I use 6X8 boards under mine. On my popup I have a level gauge close to the main door entrance which has to be level otherwise the door wont open and close freely. I like my POPUP roof to be just a tab lower behind the trailer so that water run-off from the air condition goes to the back of the trailer. The front of the trailer of course has the awning setup. I will adjust the front stabilizer to make my level gauge lever usually cranking on the rear front stabilizer some. Once it is level than I can install my popup front door assy. works every time when I see it level to start off with..
What you don't want to do is lift the trailer up using the stabilizer.
Roy Ken