When I say, as level as possible, it comes with a warning. My pin box was adjusted so that the RW was spot on level. Unfortunately, the top of the pin box was far too close to the underside of the cap and the two bolt heads which fasten the air bag to the inside of the pin box gave a big, fat kiss to the cap's underside. This resulted in a puncturing of the fiberglass when the pin box flexed going over some deadly roadway on the NYS Thruway north of NYC.
And this turned out to be a good thing as I've found that the hole allows for drainage of the condensate from inside the cap when we're camping in sub freezing temps. I suspect pulling the front wall out of an FL model is more intensive than other models, but I really don't know for sure. In any case, it's a job that would require much more time and patience than what is available to me now.
2012 F350 KR CC DRW w/ some stuff
Cindy and Tom, Toby and Kasey (our Berner and Newfie)
Oh...I forgot the five kids.