Larry-
I usually use x-chocks, stabilizers, and a pair of jack stands in the middle of my travel trailer when set up. I still experience a decent amount of movement with these in place. I have been reading this thread since it started a few days ago. So, curiosity got to me this afternoon. Since the snow had melted and it was a warm 40 degrees, I pulled out my jack stands and tried the method you described. I have to say, just with those 4 jack stands in place, it is way more solid than any other time I have set it up. I See what you are saying that a rear living room floor plan may have a bit more wiggle so I am thinking of using that Valterra stabilizer across the back bumper to help eliminate the back end bounce/wobble. Using that, and installing my x chocks, I think I will be very pleased. Thanks for you suggestion.