Hello, my name is Michael Oberg. I'm a German mathematician and freelance software developer. I found this channel nearly one and a half years ago. The most captivating topics for me were the Outward/Upward bound series and the videos about space habitats, as I was heavily influenced by Gerard K. O'Neill's predictions as a teenager.
I would like to provide a new upward bound theme: a skyhook successor, the skyhook chain. Look at www.youtube.com/watch?v=i6Tr-pucu-4 for details. This video starts with an explanation of the benefits of such a system for the upcoming space industry, followed by explanations of the old concepts and their flaws; the explanation of the new concept itself starts at min 31:30. Is someone interested in discussing that?