Added pullup+down to the PCF Addr lines, CGND connected through RC to GND near PSU

consolidated a few parts, setup BOM output for assembly

removed variants (not needed), polygons for ground and power added, mains keepouts added, drc errors fixed

processor and io expander routing finished

Initial layout of power supplies, added mounting holes and shifted channels to accomodate them

Channel measurement routing done, interleaved channel connections to loads

Grounded unused FET pins, input channels routed

Removed numerous IO expanders no longer required for FP LEDs, Diodes on rail switching changed to FETs, window comp changed to open collector, 12V PSU changed to smaller footprint, changes pushed to PCB and routing started

Some footprints added. Placement refined.

Rooms arranged and moved to PCB area