At the recent RV show, I saw a few units sporting the rota-flex pin box.
Here's a link: Rota-Flex Pin Box
Anyone have feedback on one of these? I'm running an 18k 4400 Superglide which has some bushing for the auto-slider. These bushings flex and causes some "chucking" noise... (The stop is properly adjusted)
Seems like this sort of pin box would be the first thing to flex and might reduce flex in the slider...