THIS IS AN UNTESTED PROTOTYPE: Inspect fit tolerances before printing. This is a 3D printed harddrive bay for standard 3.5in harddrives. It uses bare drives without the need for trays/rails. The door actuates a lever arm to unseat the drive for removal. It fits in a CD drive bay and mounts the same way. SATA hotswap capability requires a motherboard with AHCI. Required hardware (lengths are not strict. Check files for exact hole lengths): 7 M2x15 2 M2x10~12 1 M3x35 CD drive mounting screws (M3) Future plans: If I can get dimensions for a cheap SATA 22-pin cable (like this one ebay.com/itm/Male-to-Female-7-15-Pin-Serial-ATA-SATA-Data-power-combo-extension-Cable-FO-/291369269696) I would integrate it into the rear plate. This would make the connectors slide together more reliably and with less tweaking of the dimensions.