Step 2: Cube Construction
Firstly, make yourself a wooden jig to hold the LEDs when you solder. I spaced mine 1" apart. Solder all the CATHODES (-) together in the plane.
Once you have all 5 planes done, its time to go up! Use a 1" spacer between the planes as you solder. Be sure you run enough wire vertically for all 5 planes, and then some extra.
Done? Congratulations! You just made about 300 solder joints!
Second Thoughts: Upon completion, it appears that the Cube leans, and thats because it does. When attaching the planes to the vertical wires, I attached to the same side of the LED lead each time. To avoid this, alternate which side of the lead you attach to the vertical wire.