Dave and the crew start their all-aluminium Ridler build by creating a fibreglass buck; Dave realises there may be a problem with the roof.

The fabrication process begins, and the team begins to see how difficult building a car out of aluminium by hand will be.

After almost a year of fabrication, the team starts assembling panels into the shape of a car. The chassis is also made of aluminium, and after a painstaking frame-design process, the two wild shapes are melded together for the first and last time.

The team passes a huge milestone, as the body and chassis are merged with mock-ups of the other major elements of the car.

Dave agonises over the colour choice for the Ridler build. The previous five winners were all yellow, but Dave decides to go in another direction.

The Ridler car's engine and transmission are married for the last time and installed, and the team moves on to the wiring and other systems.