I hear ya on the rendering. This systems sketch was by me, for me, but I published it with minimal effort just in case it might help someone else. It probably would've been better just to publish a link to the model than to embed it, though.
As for the content, it's ad hoc, albeit not entirely without evidence. It's based on a bit of self-study (e.g., autoethnographic observations of my own thoughts and behaviours and passive reading of the psych literature on procrastination).
The centrality measures shouldn't actually be there... Long, boring story short: they're an artifact of some systemic leverage analysis [1] I was doing on a more involved model[2].
Last, I'd love to see those cognitive models. From what I've found, we understand a great many of the pieces of procrastination, but it still takes work to put them together for any one person's situation.
[1]: http://openresearch.ocadu.ca/id/eprint/2888/ [2]: https://embed.kumu.io/fc78b8660224a57734e0bb6c52cebbd8#anxie...