I'm loving your build, Very similar in concept to my next build. Unfortunately I have to make due with as few plants as possible so I stay legal. I'm going to run a 1000w suspended like yours in a vertical screen with a recirculating DWC system with 16 plants, 2 per side. I was going to run my light in a through-n-through vented cool tube, but may reconsider after seeing your grow. I would be able to increase the diameter of my grow without the cooltube, and achieve more surface area on each screen, but am worried about temps. Also, you mention that your canopy is about 5' tall, do you notice a difference in bud quality at the top and bottom edges of the canopy? My plans were for a 4' tall screen, but may go with the 5' if their is no change in quality.