Yesterday was another ply of glass after the usual clean up. You don't need any pics, it looks the same as ply 3. All up there were 2 plys, then I cut and cleaned the pipes and taped them at the rejoin. Then another two plys one top. The plys are a bit thicker than usual as I overlapped 1-2" where I could. That said, after three ply they didn't feel strong enough. This morning with the 4, I had really rigid pipes, what I was going for.
All up they weigh in at 15.5 ounces. Ouch, but this is a safety item I did not want to compromise. Pic 2 and after spending the day fitting both pipes and prepping, I floxed them in tonight. A lot of flox and a bit of peel ply at the transitions too. They should make the sides more rigid if anything. Good to tick this one off the list.