Note that the PCB is behind the schematics and the library by one "revision". It
has been decided to keep it as is and mount the connectors on the support card,
and use wires to the electrical connections card.

Some clarifications about the mechanical layers:

- Mechanical 1 serves as board outline
- Mechanical 13 serves as the the support board; this is to be machined using a
  milling machine, preferably on a copper board
