Electronics tower for 3D-Printer (here Tevo Tarantula)

THIS IS STILL UNDER CONSTRUCTION.
This is my current project on making my printer safer and quieter:
The problem was the sheer amount of cables hanging around the printer, making it a nightmare to change anything on them. I also noticed the original power supply putting out slightly wrong voltage and being very loud (it simply lost my confidence).
So I started looking for safe and affordable solutions to this issue. ATX power supplys are very common for PCs, safe and affordable. They also com