This model is an extra simple bracket to assemble the NerdQaxe+ with 2x 120mm fans and its original power supply altogether. And yes! It looks like a key. :)

The fans are intentionally displaced (rear fan is higher) to achieve better cooling.  Both fans achieve best performance if blowing towards the PCB. Tests with enclosure and/or ducts revealed that this simple approach is quite good. The power supply is cooled with waste air.

Temperature with OC at expected 2.8Th/s:

• Frequency: 550MHz
• Core Voltage: 1350mV
• Power consumption: 69W
• Fan Mode: Classic AFC
• ASIC Temp: 53°C
• VR Temp: 51°C

Requires:

• Screws: 
  • 10x M3x10 
  • model explicitly requires M3 rather than self-tapping M4 (limited space)
• Fans: 2x 120mm (if different models, prefer stronger one as front fan)
• Brackets: 2x (print time <1h; for left side print mirrored)

Print settings:

• wall generator: classic
• scarf seam: contour and hole, aligned
• layer height: 0.22mm
• walls: 4
• top shells: 6
• bottom shells: 4
• infill: 0%
• skirt yes, brim no

See also FreeCad project file on GitHub: nerdaxe-plus.FCStd