At the Williams factory playfield assembly line, we saw how the myriad metal and plastic parts came together for a specific game: Taxi.

Starting on the back side, assemblers positioned and installed T-nuts. The assemblers used pneumatic tools hanging from ceiling trusses to quickly hammer the T-nuts' locking prongs into the playfield wood surrounding predrilled holes. The T-nuts provided secure, threaded mounting points for large playfield parts added later.

Assemblers added more and more parts, flipping the playfield to work on both sides. The assembly order was well planned so that later parts were added on top of earlier parts. As any pinball mechanic or collector knows, much of the effort to replace a failed part involves the removal and later replacement of other obstructing parts.

Next we watched how wires were assembled into cables.