Looks great, the small gap between the aluminum and the false floor surely would be taken up by the carpet or upholstery you will be putting on the plywood I would think and shouldn't be a issue should it Dave? As for epoxy vs bondo, I was going to epoxy my Hagan gas door to my body (metal to fiberglass) and the company I ordered the fuel door from even sold a epoxy for bonding the unit to 'glass but after calling Pete Hagan he said use plain ol' Bondo as well as the bondo will not buckle the glass, the small tabs appear to allow plenty of expansion though and shouldn't create a problem I wouldn't think but a tip like that Roger can save a bunch of bucks as epoxy is 8 bucks for 4 ounces compared to Bondo at 45 bucks a gallon!