Most of the aluminum mouldings are right angles in various dimensions. The lexan is attached via small stainless nuts and bolts though holes I drilled about every 5 inches. The width and shape of the aluminum was dictated by the surface the lexan was to be attached to. Basically the aluminum moldings are the structures that attach the lexan to the rest of the boat. Before it was finally assembled I had the aluminum powder coated. You can buy the lexan in any size you need, but it is expensive.
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