As of now, I have Rotochocks between the wheels and have tried originally the UltraFab Eliminators (originally) and now the SteadyFast system. I've always had a fair amount of movement. It's definitely better than without- but, I can tell when either kid rolls around in the bunkhouse (3 and 11). I can only imagine "what" they feel with us in the bedroom (aghast! gasp!).
I have read here over and over that adding stabilizers just ahead of the axles should take out the remaining movement (except when someone is coming up the outside steps and step stabilizers takes care of that). Recently on my blog, the creator of the SteadyFast system indicated that a good bit of movement is coming from the rear electric stabilizers and that I would get good results if I added screw stabilizers back there.
So one of my recent Amazon orders was a pair of screw jacks. I first tried them at the rear of the camper and other than taking weight off of the rear stab jacks, I couldn't tell a difference.
I moved the jacks to just ahead of the axles and twisted them up as far as I could go. AND... no difference!
So seriously... for you all with 40'+ fifth wheels who claim you've got "rock steady" setups. Please tell me wtf I'm doing wrong!