I have a question about the corner trim on the toolset coaches and others. It looks like 1-1/2" aluminum angle. How can you get it in 30' or 35' lengths to span the top of the roof continuously? Is it spliced in the middle? Also, what are the storage areas trimmed with? Some look like they are a kit and the trim work is powder coated. Also, does anyone know where to get the large trim piece and rubbers for a slide-out.