Once I constructed...
I once constructed a monster machine for a C level who wanted the best. We had no budget for such a beast. I entered our parts quagmire and began to build a Franken-beast from an empty Apple Mac Pro G5 case, the impressive metal ones. My surgery included the insertion of 4 120mm fans for droning sound plus a mini-itx board attached inside with zipties and some rubber cement to prevent vibration. It was a thing of beauty and sounded like a hovercraft. The C level person flipped it on and grinned ear to ear. I ended up having to make 5 more for the other C dwellers. I nearly cleared out our storange bins with a hodgepodge of bit and peces. I used locking screws so no one could see inside the concoctions that I inflicted upon them. They seemed to serve as noisy furnititure rather than perform any function. They were happy and our budget was increased to to provide more drony furniture. It was fun and purely psychological.