Thanks for sharing this, it's quite fascinating. I've been in a bit of a slump music wise and this has given me the impetus to start exploring again.
It's given me a idea for a little project to start honing the front-end web skills I've been learning too. I'm going to try to create a website tool that allows a user to generate the negative harmony for a selected key. From my googling, it appears there's a gap in the market which lays out that info in a simple and nicely presented away. Especially as this subject seems to be all the rage at the moment following the Jacob Collier interview.
Though a brief search reveals that the guy who created this site on the circle of fifths very recently registered the domain 'negativeharmony.com', so he probably has a similar idea to me. I'll have to see if I can come up with better domain name.