On a request by @XodiumLabs I made this little base to light up your G4 Cube. You can find photos on Xodium's Cube thread.
The files are on Thingiverse, and on MS GitHub. You can adjust the height and thickness on the OpenSCAD model.
The files are on Thingiverse, and on MS GitHub. You can adjust the height and thickness on the OpenSCAD model.