[Howard Matthews] mills his own PCBs, and man, does he hate drilling through-holes. Manually changing the bits between engraving and drilling after isolation routing? What is this? The stone age?

The evolution of PCBs from large and antiquated “printed wiring boards” to today’s fine-line designs on high-density interconnect (HDI) PCBs, IC substrates (ICS) and more, has been matched by ...