Mini-ITX NAS Open Frame

This is an open frame modular chassis design for a mini-ITX based NAS or home server.

The chassis measures 30.4 cm 22.8 cm x 22.8 cm and can take:
- An ATX PSU
- A mini ITX motherboard
- Up to 5 x 3.5" HDDs (bracket holes are spaced for 1, 2, 3, 4, or 5)
- Up to 3 x 2.5" HDDs or SSDs.

This makes it pretty much the most compact mini-itx case that can handle 8 drives and a full blown ATX power supply.

Notes:
- The current design is not designed to take any extra PCI cards, but it can easily be modified. For large video cards, you will need to make the frame deeper than this one, by using tubes that are maybe 240mm long instead of 20mm. You might need to design an extra bracket to hold everything together.

- The illustrations show a setup with two 3.5" HDD rails on the top. If you have more than 2 drives, I strongly suggest printing two more rails and adding two 12 mm crossbars to support the drives from below.

This modular design uses 12 mm tubes or rods and is base