HDD Rack Modular Caddy system (wip)

HDD caddies itself are snap-in design, no tools required. Orient the prints so its most structural-strong.

You'll need M4 square nuts and M4 mechanical (mean hexagonal key hole, DIN 914) screws (you better get used to it, all of my prints use these screws) to assemble backs of the units if you desite to.

Its still WIP, I plan to add FAN mounts on the backs, but so far they worked ok on my side just by being stacked inside.