Designed this to mount lots of 3.5 hard drives to 20x20 aluminum extrusion frame. It could also be used to stack. it's made so one part can be printed multiple times and can be used to link to the top and sides of itself.

Made it to glue in these SAS cables: https://www.amazon.com/dp/B09Q33VV5V?ref=ppx_yo2ov_dt_b_product_details&th=1

Uses these thumb screws to hold drive in: https://www.amazon.com/gp/product/B08HHZNN4T/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I'll upload images soon.