@Thimo(View Post) give me the link to your bomb please. I'll try to improve the defence in future.
Thanks to all, who voted! =) --- I updated the system. Now it's more compact and effective. The bunker is also updated. Now it can't be destroyed by a nuclear explosion even when the defence is not activated. The only way to kill the STKM is to use BOMB-particles or extremely high pressure or SING-particles.