Vented Case for Olimex A20 LIME

I took some inspiration from the popular Raspberry Pi case and designed a similar case for my Olimex A20 LIME board (which I'm using to run my printer with OctoPrint). It's got a vent for a 40mm fan, pushpins to secure the fan, and a grate if you don't want to use a fan. The case itself consists of a main body and a rear cover which slides over the open end of the case.