Have less than 10,000 miles on our 2008 Dolphin Class A DL35C, and the floor mounts supporting the motor assembly have worked loose. The 3" screws will not retighten as there doesn't appear to be anything under the plywood floor for the screws to grip on. One has to ask, "why the 3" screws to begin with?" I tried redrilling new holes off to either side of the screw hole but no luck with the holding. I took my bottle of Gorilla Glue under the bed with me and poured a bead of glue all around the mounting brackets. We'll see how long it lasts before the torque of the motor breaks it loose again. Any other souls out there with loose RBW slider parts??