This custom build was made by me between 2012 and 2017 and is still (2021) nearly every weekend in use with XBMC/Kodi. It started as small size gaming rig and then changed to a silent pc where i can save and watch my entire movie collection. I used this pc a long time without the outer shell, before i finally completed it in 2017.
The outer shell (the black and gold sidepanels) are made of aluminium (like the most parts on this case) and plastic and mounted with magnets. And if you miss the atx connector from the psu at the mainboard, i soldered it on the backside of the mainboard to get a more clean look. ;)