@Enzo Yes, I watched the same vid and came to the same conclusion; bigger lighter reinforcements are better. Also that 90 degree corners are big stress raisers, hence my initial plan for a many sided teepee, i.e. gentle angle changes between adjacent panels. Which means more tieout points, which means less stress per tieout. It's a virtuous circle. I want some proper glue too, and couldn't find U-09FL online either.