I just installed a set on my fifth wheel. When locked down, they have taken out all the shaking and wiggling. Don't have to use the tripod under the fifth wheel pin anymore. They are more expensive than some of the other brands, but they were fairly easy to install and they are easy to operate. I do have a set of scissors jacks mounted to the frame directly in front of the wheels to remove the bounce. With everything down and locked in, the fifth wheel is almost as solid as a rock! I kicked this idea around for several months before deciding to install them, but I am happy that I did.
2016 Eagle 323 LKTS
2009 GMC 1-ton Dually Diesel