He can crank out a 6/6 mil double-sided PCB in 45 minutes flat ... After 90 minutes, he polished the board again and separated the vias to prepare for the real test: solder.

Starting with a naked sheet of FR4 substrate, they drilled out all the holes needed for their PCB layout ... to act as vias to the other side of the board. Fine traces of solder were then applied ...