These are not that easy to build, however the OP of that thread will make you properly wired 8 port Poe units. It involves cutting unwanted traces and soldering short wire jumpers to the board.
I ordered mine from the OP as I am too busy to mess with it right now. I am going to build the same cable without all the Poe connectors and see if it sounds as good. I won’t be able to get to that for another month however.
I made starquad DC cables for folks just like Ghent’s and with better wire. However, my customers tell me the Poe based cables are just another big step up!
I read through most of that thread to understand what the OP did.
My first experience with Poe to be frank and it took me awhile to get it.