that's so MacGyver looking lol, thanks for the picture. the pipes are there for air flow I suppose?
From what he wrote this is the assumption.
On the other hand, he also wrote about speed problems. So before you spend your money on anything, think carefully whether it is worth following cheapness. Think carefully about choosing a particular sbc. Because then people cry that they have slow sbc and what to do (raspberry pi).
If you do not want odroid hc
then maybe look at Popcorn Hour Transformer