We all have the same issues with our Windjammers. With our 3008W, we have found the X-chocks somewhat helpful, although to be honest, the movement really doesn't bother me enough when it is just me and my wife to justify the effort on short stays unless the DW complains. Another thing which I've found somewhat helpful is stacking a couple of 6" x 6" lumber blocks under each of the four corner stabilizers to prevent having to extend them too far (i.e., too upright), and then revisiting the four stabilizers on the morning of Day #2 to snug them up in case the blocks have settled into to the ground at all. In the end, I think there is just a fair amount of "bounce" which is unavoidable in these units.
2013 Windjammer 3008W
2006 Chevy Silverado 2500HD 6.0L w/Equalizer 4
Nights camped: 2012 (29); 2013 (26); 2014 (40); 2015 (43); 2016 (35)