The photos span some time but for your enjoyment..
I took an old tower PC case and removed the motherboard, then mounted my bits:
- Original ATX Power supply powering the disks
- SBC is a RockPro64 + a 6 port SATA Controller in the PCIe slot
- A PWM Fan controller with a temperature probe near the disks.
- ATX power supply breakout board to power the SBC and the Fan controller