Bomber pilot controls:
The 'fire primary' would shoot all forward firing guns straight ahead, not just the fixed guns, but the man'able ones too... maybe with a convergence setting.
The 'fire secondary' would fire all the other guns straight out, so rear tail ball etc etc, would all fire straight out to the centers of their arcs.
Case in point:
Ju-88's front gun, the pilot can fire this with normal trigger.
He-111 front gun(s), the pilot can not fire these, he has to move to the station first... so, boooo!
Both front weapons had a actual gunner guy there, so hmm... HTC preference?
I'm sure all the bombers would like this stuff...