Current PCB has CLK/MOSI running to pins that can't be used by SPI. Fixed by cutting traces and rewiring to new pins; will resolve in schematic/pcb at some point

First set of LED strings I got was Ground, RGB. Second set I got was +5V, RGB.

So far it looks like the workaround is to wire the + into the 5V VCC being supplied by the board. This causes the wipers on the pot to work backwards (255 is off instead of full).

Have to rotate switch 90 degrees if using B3F-1000 switches with existing PCB. Option 1 is to bend the legs of the switch, option 2 is to change switches, option 3 is to rotate the pad 90 degrees on the PCB (not physically rotating the pad, obviously, but rewiring the pins) file. This will be marked fixed when option 3 is implemented.