2.5" x12 HDD cage stack and cap
thingiverse
Bit niche, but I have 12x 2.5" drives in a full-tower PC case that I am using as a file server. Wanted to see if I would turn it into a smaller foot-print with mini-iTX case. Should allow you to screw in top and bottom (assuming you print the cap part too... though theoretically, you could just scew in the bottom side edge of the drives - might be strong enough, but the cap is meant to make the the drives more secure as they'd sit in a recess at top and bottom as well as being screwed in top and bottom) This is untested/printed.
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