And those add2psu adapters I highly doubt they do any kind of load balancing. You can make your own perfectly effective and safe adapters for $1 with a male atx connector, an insulated piece of wire, and two connecter pins.
Flash drives are great for files and multiboot disks, but they are slow for OS. A few bucks more can get you a cheap ssd which will make all the difference in the world when working within the rig.
So, the 1x risers plug into the gpu card, and then into the mother board? And there should be a plug that will go into the psu for each 1x if I am correct?
I think I have also settled on a ssd.