If you keep up with various retro vacuum tube projects, you probably have run across [UsagiElectric] aka [David]’s various PCBs that he makes on his own Bridgeport EZ-Track 3-axis milling machine — ...

Precision milling has always been locked behind a "members only" sign – giant machines that take up massive warehouse space, cost more than your first car, and hum like an old air compressor 24 hours ...