A colleague was rebuilding some very rare vintage Neve modules (1058 Germanium transistor, powered by negative 24V, with black panels and black knobs), and they were missing their B100 preamp PCBs, so he hired Eisen Audio to layout a replacement. Note that we didn’t just scan and trace the original card, but rather completely re-drew it, resizing and repositioning the component footprints as we saw fit. This was done to keep all holes on a 0.1″ grid for modern fabrication techniques and automated assembly.