RPi 4 Case 30mm Fan Remix w/Base

This is a remix of koretic's (https://www.thingiverse.com/thing:3747550) excellent remix of John Sinclair's (https://www.thingiverse.com/thing:3723481) excellent Raspberry Pi 4 case.

There is one change and one addition. The change is that I put a coarse grille over the fan, and the addition is a small customized base to hold the Pi upright that leaves the various connectors and vent holes clear.

Thanks to both koretic and John Sinclair for the great designs!