Heavy-duty wheels are moulded or machined before being fitted with bearings, axles and swivelling metal frames to form industrial casters. Cakes are baked, stacked, covered and intricately decorated for weddings; precision optical and electronic components are calibrated to create terahertz spectrometers; and lightweight composite hulls, crossbeams, masts and rigging are assembled into racing catamarans.

The show’s own verdict is on its page.