2U hard drive rack

This is a modular system to store hard drives in a DAS disk shelf.
To build a basic unit:

Order these screws: https://www.amazon.com/uxcell-Laptop-Shockproof-Phillips-Screws/dp/B0159MSHPS/ref=sr_1_38?keywords=computer+shoulder+screw&qid=1558755930&s=gateway&sr=8-38

print a set of the 5 beams per 4 hard drives
print the 3-stack to allow more density over the 2u space
if you want it to look pretty, print the front, PSU mount, and back
for cooling, print a midplane

All the parts should friction fit into place, but you may want to glue parts. if so, beware: the middle sections can be hard to remove drives from.