I recently upgraded to a Simagic Alpha DD wheelbase and I now have to worry about a power brick.  One area that is out of the way and underutilized is the back of the wheel deck uprights so I decided to design a 40 series mount for that area.  It turned out well, utilizing M6 flat head hardware and a two part system (base and strap), that allows the brick to mounted in any direction.  No matter what, the power light will be visible on the bottom piece, and make sure you mount the strap so that it can always be visible as well.

After significant cable management, I think it turned out pretty great, no rattles, very solid and most importantly it is out of the way of everything.