For those of you who are looking into this kind of stabilizer, check out this website:
www.steadyfast.com. I have his unit on my Montana and on a small 20' pull trailer. Two other rigs accompanied us on an 11,000 mile trip last spring and we all agree - there is virtually no movement with this stabilizer deployed. It has done such a good job that I have sold my tri-pod because I don't need it any more.