Dell 3.5" HDD bracket vertical mount

I have designed this for my Dell Optiplex 390.

I wanted to install my large PCI GFX card into my new computer. The original HDD mount was in the way for the end of the card and it's power supply plugs.

This is designed to be mount to the inside of the case with 3mm (or larger) screws with a lower mount that rests on the inner casing.
The universal bracket is deigned to slot into other but will need gluing to make the parts solid.
I have designed a spacer for the HDD that will fit thinner 250GB drives and also larger 1 TB drives. This is a push fit but can be glued if needed.
The HDD are only secured by gravity and shouldn't fall out unless the case is turned on its side.

I only plan on fitting 2 HDD into the computer case due to space

The 3mm mount should be printed solid so you can drill out the hole to suit the thread size that you want to use. This then gets glued to the Universal Bracket
The bottom support gets glues to the lower of the 2 holes to help support the b