The code lock system (4 dial) is painful to use when you have many walls protecting your base. To add insult to injury, when someone breaks one of your walls down and the code lock drops to the ground, the game shows you the code the person was using to protect their base. This forces people to have to use numerous different codes to keep people from an easy entry.
Please make a modification to have the code lock not display your base code when it falls to the ground (maybe it defaults to 1,1,1,1). This will allow for someone to use one code for all the locks in the base and make the difficult process better. There is no reason someone should know your gate code after breaking down a wall.
It would be great to have a better system to the code locks in the future.