Structure and building
At the beginning the main design was based on two levels: lower (with motherboard and PSU) and upper (with water cooling parts, including the pump, radiator and two reservoirs). That model changed later on because I didn’t like the idea of keeping the watercooling system above the hardware, in case of leakage, so I decided to put the hardware above the watercooling.. Also, with the hardware up top it means I could see the meat of the system!
For the main structure of the Cube I used clear acrylic 20mm square rods and 5mm clear acrylic panels. To screw those acrylic rod columns together I used brass threaded inserts and bolts. The technique that I used with the brass threaded inserts was to first drill guide holes in acrylic rods and then simply push the brass inserts in by heating them up with a soldering iron. It was a very successful procedure: they went in like a hot knife through a butter.