Sorry, just saw this.
It utilizes a single board, control board, PSU from an S9, and the LOKI kit (video shared )
I have been working on a step by step guide on my website (slowly)
Will add some more this week. https://www.montanibitcoin.com/montani/slim19
Feel free to reach out if you need help building one, I also have some SLIM19 KPRO builds for sale. (again, need to update website)
Here is the GITHUB for the project: