I knew from the first line I was going to like this. And it didn't disappoint! I think I'm hooked on note-taking and note-taking systems as well.
Have you read How to Take Smart Notes by Sonke Ahrens? Your system reminds me a great deal of the approach in this book. The Zettelkasten approach. Great read if you haven't and I highly recommend it.
Now I'm curious about your other post...looking forward to reading it.