every part of every inner circuit board trace gold-plated. (That is very rare?!
addition, there are extensive “vias” or plated holes that go through the board, from one side to another. Every one of these costs manufacturing money, and yet they used two vias per connection on most traces, and four vias per connection at the more critical locations such as the power and ground lines. This costs more to manufacture but also reduces the odds of a bad connection. These boards are also made out of heavy-duty fiberglass-reinforced materials, instead of the more common non-reinforced phenolic resin boards that the Emerson family carts used.
