1. A 3-pin straight pin is added to connect with 3D touch auto leveling sensor.
2. The USB connector will not provide 5V for the board, if you need to refresh the firmware, please provide external power supply.
3. The power port has been changed from hollow to solid one to provide higher current-carrying capability.
4. The three heater connecter has been changed into blue ones: 2-pin RC301 5.0mm 15A