I found this interesting link when I bought ordoid-xu4 for my another project:

http://forum.odroid.com/viewtopic.php?f=116&t=12191&p=85974

The acrylic case looks very cool. But I don't like aluminum reinforcement bars.

There is more detail on page 38

http://magazine.odroid.com/assets/201506/pdf/ODROID-Magazine-201506.pdf