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A multi-part roof panel with front and rear end caps are used because they are cheaper to manufacture , cheaper to assemble on the line , and require less skilled labor .
An RV is subject to hurricane force winds every time it moves !
There are several companies that use 1 or 2 piece molds with reenforced inserts to manufacture the shell for their products that are waterproof and durable .
Airplanes and yachts both use seamless curves and adhesives in critical components .
I think it would be a cost effective upgrade .
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