A: The X728-A1 does not occupy the GPIO, it use the PIN 2,4 to provide the power.
Q7: How can I remove all software created by the setup and start over?
A:
1) sudo /etc/rc.local , delete x728pwr.sh
2) sudo rm /etc/x728pwr.sh
3) sudo rm /usr/local/bin/x728softsd.sh