Went and did it yesterday. We purchased a Cougar 29RLI. We are experienced RV'ers, currently spending about 9 months a year as CG hosts, but we're cramped in our current 28' TT with one small slide. ...
Here goes ---- B&W has a gooseneck that mounts under the bed. Their Companion fifth wheel hitch has a square post that goes into the gooseneck and the hitch base has a vertical tensionbolt and 2 U bolts that attach to the post. The hitch has two pins to attach it to the base. Bed is completely flat with the hitch removed and only a round 4" hole.