Emmm Mr Cav sir, did you ever happen to notice.
All buff guns track the same target at the same time. As much as they can anyway. So if your in nose gun and tracking a target obviously tail gun won't be on target. But its going to swinging left or right trying to get on target.
So how do you expecct to jump back into any gun and find it where you left it?
Unless you "uncoupled" the gun, so it would not track, and could not fire. Its never going to be where you left it. Its simply not possible as long as all bomber guns track the same target.
And did you really want bomber guns not firing if your attacked?
If all bomber guns were independant again, and only guns fireing would be the ones your manning. IE no AI, no otto, if your not in the gun shooting nothing shoots. Then you could leave the turrent and the gun would stay where you left it. But surely this isn't what you want?