Hi Gunnarts, We put "JT stabilizers" on our Cardinal 29ts 5th wheel and we're really happy with them.
I put them on all four corners and they stay right on the landing legs. All you do is loosen the hand screws and lower or raise the landing gear then tighten them up and no wiggle. I also recommend these for travel trailers. I haven't seen "Steadyfast" but I.m sure they're on the same line. It makes me wonder when I see all these travel trailers and 5th wheel trailers without these I wonder how uncomfortable it must be inside but I guess after a few cocktails
and a long day of to much fun
you really don't notice that much. I've seen all kinds of blocks and screw jacks to try to steady trailers but wow that's a lot stuff and work you have to go thru.
It will be a good investment and you'll enjoy your adventures with a bit more comfort.