RPI 2/3/4 fan holder

I wanted to add a fan easily to my new RPI 4, but continuing to use my "case"
https://www.thingiverse.com/thing:2894841
that allows me to connect and experiment.

so I designed something very simple, I give you also the fusion360 files so you can play and resize for a bigger fan.

I am using a noctua 40mm that I had laying around for a while, it is a 12 volt, but it works also at 5v and it is super silent, keeps the temperature to 35°C instead of 48-50 normally during idle.

if you modify or improve it just let me know.

enjoy.