DIY Micro Server Drive Cage Chassis

I built a tiny openmediavault server around my kamrui mini pc but the drives are just sitting next to it on a table in my basement just begging to get bumped/damaged so I thought it'd be a good idea to design a little enclosure for the whole setup. My constraints are the drives I want to use are western digital 5tb my passport portable drives (I have a few and they are often on sale) and fasteners are M3 (4x 6mm for each drive cage, 6x 8mm for the front fascia, and 4x 8mm for the rear 80mm 12V fan). The drives simply snap into the cages and are just as easily removable by slightly flexing the pla plastic sides of the cage. The little top clips on the cages must be supported but all the ventilation holes print fine without supports. The main chassis only requires a tiny bit of support for the integrated fan cable routing hole towards the bottom but otherwise prints flawlessly when printed fan hole facing downwards. I plan on designing a little boost converter to power all the fans o