Make it so the kingpin keycard can open the mcz doors in epsilon, but not the mcz gate or hcz doors. The kingpin keycard is supposed to be better than the ordinary stolen keycard and is a more limtied item. Further more, the hacking device should also be usable on the doors located inside the HCZ. There are some doors in 106’s chamber that cannot be hacked, such as the doors leading to the doors leading to chamber control room.