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I trimmed the top edge with enough excess to enable me to hammer it over the tubing, which provided a nice radius to the bend. It also meant a single screw would hold overlapped sections in place. If I hadn't been relying on others to weld the aluminum for me, I'd likely have trimmed each section to form a butt joint here and welded the sections together, and to the tubing. As it was, I used sheetmetal screws, which will be covered once the roof is finished anyway. View Related Article
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