Thanks, timbo, you're very kind! I am indeed an engineer, and I did indeed design/build this particular setup, but what success I had was only because I stood on the shoulders of guys who went ahead of me and took time do really good how-to work like this: https://steemit.com/hydroponic/@mono/how-to-build-a-hydroponic-wall-garden-urban-farming-in-south-africa-happy-gardening
If time permits, I'd love to start provide really cool content like that, even if just for us crazy niche people.