I assembled the base of the frame with rivets and corners from the furniture store.
I use a compact PSU in this project - Termaltake SFX 600. Sorry, Coolermaster, but you do not have an assortment of compact power supplies.
Of course, it's better to remove all references to a competitor. I tore off all the stickers.
The fixtures are made from an aluminum corner, and are clipped from inside to take up less space.
Also, to the middle part of the rivet, I attached the upper ribs and the screws (temporarily) the lower ribs.
Approximately so it looks together with the power supply and on the base of the frame.