Last week I draw a Casing with Fusion 360 and learned a lot about this application. Great work guys. I printed it with my Hictop CR-10 3D printer.
I love the Orange Pi, less power consumption and with Armbian I was able to program in Java and control some hardware.
Here are some pictures:
Some prototypes 
Last version 
With connector for I2C 
Two shelfes 
With orange pi and WiFi