Very timely post.
I just finished installing a cockpit cover using Coolaroo shade fabric on a SS frame I fabricated. I have been contemplating and experimenting with various shade designs and fabrics for 6-7 years trying to find the right combo of quality, function, price and appearance to suit me needs for cruising and sturgeon fishing. I need to be able to fight a fish all the way around my boat without vertical structures interfering with the fishing rod so I was looking for a cantilever or support-from-above design. I lived with a temporary prototype of similar size and form for 5 years and it held up great.
I bought the Coolaroo 7' x 13' shade sail from Costco in matching burgundy for under $30. It comes with a 10 year warranty.
I picked up 60 ft of 1 inch 316 SS pipe from the local steel supplier for under $200. I bought a pipe bender from Harbor Freight but it was insufficient for the big bends so I returned it and used McMaster-Carr 316 SS fittings instead.
I had a local upholstery shop sew the fabric with Tenara thread and install grommets for $400.
Initially, I had planned to place the fabric above the frame for lashing but changed to below the frame to test the appearance and function. Since I was departing on my @DeltaBridges Tour in two days, I secured the fabric with zip ties to test the location and allow for material stretching, if needed, before the final lashing.
After 3 weeks, the fabric has shown zero stretch and functions great. The structure is solid and stable and doubles as a hand hold in the cockpit. At this point, I'm willing to call this project a success and will move forward with the permanent lashing after the summer boating season.