Raspberry Pi Display Flush-Mount wall case

This is a remix of a design i found here:
https://community.symcon.de/t/7-touchdisplay-wandeinbauloesung-unter-100/45295/18
The original assumes you can screw your case to the wall on the sides, mine adds holes at the back and some more ventilation holes.

This is to mount your original raspberry pi 7" display (+pi) in a (massive) wall.
Need to make a hole, 4 cm depth.

Also Required:
- 4x8mm cylindric magnets, 8x. Found here:
https://www.amazon.de/corpus-delicti-Magnet-Design-Power-Magnete-ultrastark/dp/B007WSNUE6
- screws and wall plugs, the holes at the back are 4mm diameter
- original raspberry pi display 7", DSI cable