The curiosity question I've long had is what the weight difference is between the US Body fiberglass tub is and how much the factory steel tub weighs. If I had unlimited cash and was desperate to have a fully modern, practical camping rig that occupied the same physical space as a vintage Blazer Chalet, I'd take this fiberglass tub route along with an orphaned Chalet shell that's engineered for easy installation & removal, gutted and re-outfitted with lighter weight interior and a properly designed pop-up roof that doesn't leak rain & snow into the camper unit.