We are on our second fifth wheel both with the morryde rubber pin box. The first fiver, a 2004 Sandpiper bought new with a standard box was a chucking bucking horse, first with a Reese Slider 2006, F250, then a 2007 F350 DRW with a B&W companion was a bucking fool. After the Morryde install, we had a much smother ride. It didn’t remove all the chucking but made it more comfortable. Our new Cardinal came with the Morryde box, steps and cushion equalizer system. Have hot had chucking/bucking in our recent tows.