Raspberry Pi 3b+ Mount with Fan

I've created a case for the Raspberry Pi 3b+ with enough space for a fan, which you can easily glue on the inside.

The mount is attached to the side of the printer with 2x M5 screws and 2x T-Nuts. In addition you need 2x M5 thread inserts (https://bit.ly/2WEfsWg).

This is my first project, which I share in thingiverse, so go ahead and tell me what I can probably change to improve the case.

Have fun with it :)