Not much progress on the camper floor. The old elevator bolts don't want to come out. No head for a wrench so I use vise grips on the threads below the nut. 3/8" bolt trimmed down to 3/16" and nut not moving. New vise grips that are shot.
I did get 2 bolts removed so I could add supports to the steel frame. The longest 3/8" elevator bolts are 3" and to short. Need 3/4" more for washer, lock washer and nut.