Here is an alternate construction for you. I sketched it up real quick, happy to send you the vector file if it helps.
So my iteration is to have the bent tubes go all the way up to the top plate. The top plate could be a thick piece of billet aluminum. add threaded inserts in the tubes and have exposed hex fasteners counter sunk in. to the top plate. Machine out the offset perf, celebrate the buttons a bit more, and give it a name which you could etch in to diet vinyl letter. Then moon the actual CPU case to the underside of the top plate, letting it suspend downward. The bottom could be open or pared metal for ventilation.
The top view got messed up when I scaled it, should be more like this.
