I want to use an ATX PSU with my home build 3d printer but there is not enough space to fit it because of the height. Initially while designing the printer I planned to use an LED strip PSU. Now I realized when I opened the ATX PSU that there is enough free space after the fan mounted at the top is removed. I am planning to replace the big fan with two small ones mounted at the sides and then cut and refold the metal casing to the height just enough for the internal components.
I am making a big mistake? what safety issues should I be worried about?