I took the Bighorn back to the dealership for a small punchlist of minor items, when I picked it up I noticed they had cut the underbelly several places and duct taped it back very sloppy,I think a fifth grader could have done better. Any way thinking about buying several 4 x 8 sheets of 28 ga. sheetmetal, cutting to fit between I beams , screwing to beams then lapping sheets about an inch,screwing across and caulking. Has anyone else done something similar. Will post pictures when complete.