40mm fan holder orange pi zero acrylic case

Created to allow a 40mm cooling fan for my Orange Pi Zero Acrylic Case Transparent Box. The box I purchased [can be found here](https://www.aliexpress.com/item/Orange-Pi-One-Acrylic-Case-Transparent-Box-Protective-Case-Shell-for-Orange-Pi-One/32817371123.html).

Should be compatible with any standard 40mm fan.

Supports are recommended for the fan overhang.