Perform mainboard/display firmware flashing/upgrades. Please note, we currently only support flashing official firmware from Creality or Bigreetech or Duet provided firmware or Klipper* or our in house firmware confirmed working tested firmware. [Note: When using our in house firmware please use provided wiring diagram] We are always expanding our supporting firmware, but we try to stick with tested firmware or manufacturer provided firmware's. Note: Please allow 1-2 business days for this service. 3-5 business days for custom. Note: Please include your desire printer in cart messages or email us after order. *Note: Klipper service only provide flashing klipper onto mainboard, does not include associated printer.cfg config. If you require printer.cfg please contact us for user specific option. Please don't select custom firmware flashing before and discussing with us with your specification. As option existing tested firmware may already support your needs and requirements. As this custom is starting rate for us create and compile your custom firmware, we will work with your if you we don't have physical access with printer.