message: note for jumpers
diff: @@ -28,7 +28,7 @@ For how to assemble the brains, check this wiki [here](https://github.com/Respir
  | BRAIN-01 | 1 | ST Micro | NUCLEO-L452-RE | 14.00 | [M][1mouser] | STM32 Nucleo dev board |
  | BRAIN-02 | 1 | Monoprice | 3896 | 0.83 | [Z][2amzn] [O][2mono] | USB-A to miniUSB-B cable, power/data for Nucleo |
  | BRAIN-03 | 1 | UPerfect | - | 49.00 | [A][3ali] | 7" capacitive touchscreen with speakers, HDMI/USB |
  -| CONSUMABLE-a | 1 | GenBasic | 4330127279 | 6.00 | [Z][4amzn]
  +| CONSUMABLE-a | 1 | GenBasic | 4330127279 | 6.00 | [Z][4amzn] | optional if you don't have the PCB (BRAIN-11)
  | BRAIN-06 | 1 | Raspberry Pi | RPI4-MODBP-2GB | 53.23 | [M][6mouser] | Raspberry PI 4 |
  | BRAIN-06-alt | 1 | Raspberry Pi | RPI3-MODBP | 35.00 | OUT OF STOCK | Raspberry PI 3B+ |
  | BRAIN-07 | 1 | Monoprice | 31201 | 8.03 | [Z][7amzn] [O][7mono] | USB-A to USB-C cable, 3ft, for RPI4 |
  