It was easier to find than I thought. He’s written about it many times, so if you search his profile you’ll find a bunch of stuff, but this thread gets to the heart of it. It’s very long, so give yourself some time, and every 30 posts or so hit the last post to unroll more, plus he links to other threads. He also deleted a post in the middle which broke the chain, so when it looks like the last post, click into it to see the rest. It’s worth it.
https://twitter.com/owenbroadcast/status/1096758520467333120