Another more critical issue to is that some of the Lippert long king pins can scrape your bed rails on certain trucks when turned and on uneven ground. Even on flat ground if you have a cover with flush rails the mounts dropping down from the unit frame can rub during tight cornering.
Seems more an issue on the newer trucks as the beds are higher and in order to get the unit level you need to take the hitch down which results in the combo causing the issues. Seen it happen on 2 occasions, so make sure you check all your turning with good eyes on all areas to you know your limits before it happens.
2014 375 BHFS Eagle Premier
2014 Ram 3500 Longhorn DRW CC
6.7 CTD, Aisin, 4.10's