You need Jesus
I'm just using a one header with a 3 way splitter for my 3 fans. it has been fine and it's great because they can each be controlled independently even though they are all on one header. I could have used the PSU but then i couldn't have them controlled and my system would be very loud. My fans have been working fine. I have a 200mm in the front and 2 80mm fans in the back.
First of all, you are my favorite youtuber.
As always, you have a gorgeous build. Keep up the great work!
I plan to add more pictures soon