P.S.

   In spite of all the Strong Line, there is too much flex in the panel for comfort. Even though I would love to take a photo against daylight,  I'll not hold it up more than I have to for fear of a terrible accident. I will have to figure out how do to the rest of the panels differently, with more reinforcement. I'm not quite sure how to make this one more secure, now that it's all soldered.