A 40mm square set of M3 holes in bottom of chassis for upward blowing 12V fan

[mjstn]

As we move forward on Pi4 as well as possible other Nvidia Nano and so on I feel we should place 4 m3 holes in the bottom of our chassis. We could mount a standard 12V fan a centimeter above the floor of the chassis that was able to push air up. We then align any heat shinks we choose for Pi 4 to be vertical fins so air flows through them. The Jetson nano is already in correct vertical fin orientation. We already will have with rev 5.2 a fan jack near there so hookup will be easy.