Modular case V3

This is meant to be the 3rd iteration of my modular case system. after finding this project: https://www.thingiverse.com/thing:4355821 , I got some inspiration to use some of it to help create my system that'll allow stuff like fans and drives to be mounted in a closed, printed case that can be printed on a 200mmx200mm size printer and assembled.

My 1st iteration became cumbersome to do, and my 2nd one isn't public