Given the problem with the adapter plate on the motherboard.
I added a quarter inch acrylic spacer with standoffs to raise the motherboard:
With 8 leds:
Inspired by the Decobox mod and a desire to try out El Wire:
The El Wire is run inside of polyethylene tubing for a more muted effect. Helpful El Wire soldering tutorial.
Once in place behind the fan and grill, the El wire will add a soft amber glow to the inside:
Taped in place for now:
My girlfriend pointed out that the copper shelf liner on the back of the fan looks cheesy so I'll etch a replacement at some point.
Fan spinning: