With the 3001w Windjammer both slides are on one side and both extend out 39", so there is quite a weight shift when they are pushed out.
We bought a small (12") level with a graduated bubble glass that designates 1/8", 1/4", etc. high per foot right on the glass. It is magnetic so I set it on the back bumper when setting up. We set up higher on the slide side, with slides in, at 1/4" high or slightly less, then put down the electric stabilizers and then extend the slides. The TT settles down the second day to about half way between "0" and 1/8" high on the slide side which works fine for us; bathroom door stays open without a prop.
After a couple of days the TT is at "0". I use the X-chocks between the wheels and do have to tighten the stabilizers every day or so also. Not a big deal, works every time and surface, and the DW and I have setting it up this way down pat.
D_B Travelers - 30 nights in 2016... so far. 54 nights in 2015. 2014 Rockwood Windjammer 3001W Diamond Pkg, 2015 GMC 3500HD CC DRW Duramax, Equalizer 14K hitch, TST 507rv TPMS.
"Happiness? A good meal, a good cigar and a good woman - or a bad woman; it depends on how much happiness you can handle."
George Burns (1896 – 1996)