Cheers guys, it all seems to be going almost as planned although it's a little taller than I imagined it would be. Seeing its right beside the pool fence, I had to make sure there aren't any hand holds or steps so I made the the wall tall enough to be part of the fence. They are doing random pool compliance checks up here and coming down hard on pools that don't comply.
However, I'm not looking forward to doing the shutter, at all. How wide should the opening be? The original plans show one triangle which is about 600mm on his plans but that's only 400mm wide on this dome. If you look from inside it's obvious the top pentagon should go and then follow the joins down but that makes for a curved opening, 800mm in the middle and 400mm top and bottom. I'm not keen on making a curved shutter, square is good
I don't think 400mm is wide enough, 600mm sounds right. What do they use on a bought one?