You will be delighted to here that there is more soldering: Cough Cough
(remeber to work in a well ventilated enviroment)
Lead Poisoning Yet?
Now we are going to solder the 4 layers together. To hold them in place in the clear case copper rod is used as it can be soldered on to the different layers. 5 pieces are requires, one in each corner and one aditional one in the power corner.
Put the top layer in the jig ane solder 4 of the copper rods in each of the corners to the negative rail pointing up and away from the jig.
Now solder the fith rod to your worst corner ( ie the worst looking, as it will be at the back)
Get your USB cable and strip it down, solder red and black wires to the positive and negative rail (see the last photo)
Update : Solder a 3.3 Ohm resistor (2W) into the red 5V line