Birds' Nest CAN is a USB CAN hub PCB designed for toolchanger printers with CAN toolhead PCBs. This is a USB-CAN adapter, CAN bus hub and GPIO for sensors in one compact PCB. It features 6 CAN toolhead connectors, with expansion connector for more, 6 4-pin filament sensor connectors, 6 thermistor connectors and 2 ARGB LED connectors. Birds' Nest CAN follows the standard for linear CAN bus topology, increasing reliability.