I'm I'm using my Raspberry Pi as a home automation station and printed the Raspberry Pi 7 Inch Touchscreen display case (https://www.thingiverse.com/thing:1585924). All I needed now was a way to mount it on a wall.
Top is open, so it's easier to mount the Raspberry into the holder. So far I don't see the need to add velcro to fix the Raspberry, as it holds pretty well.
The back is open to reduce the amount of filament used and to improve air circulation.
Port cutout covers the Ethernet port but leaves the USB ports accessible.
You will need two screws to attach it to the wall or you can use double sided tape.
3DJake ECOPLA PLA