harrystam :
I know how to build a pc, but I don't know how to build my own custom case.
I'd love to be able to make my own pc case for a truly custom build.
Where do I start?
1. Design. Have a vision in your mind.
2. Material. Wood, steel, alu, plastic, other
3. Positioning of the motherboard and the IO ports.
4. ATX specs and screw locations -
http://www.formfactors.org/developer%5Cspecs%5Catx2_2.PDF
An easy way to start is to obtain a cheap ATX case, and dismantle it. Free, or maybe $20 for a new one.
Get out the Dremel and have at it.