This is a redesigned version from the ground up, inspired by the following model by Schlimmer.

https://www.thingiverse.com/thing:5771853

If you want you can also print the following additions or a better visual presentation:

• Fan Covers (made by myself) for 140mm Noctua's:

https://www.printables.com/model/816896-bitcoin-fan-grill-v2-for-noctua-nf-a14-ppc-3000-pw

• Fan adapters for 140 mm made by alixanc

https://www.thingiverse.com/thing:5877154