"It seems that there are areas you WOULD LIKE to fire but you can't."
The AH interrupter is as sophistcated as it was never in WWII.
Just take a B26, enter the top turret and try to fire from right to the left on your rudder.
First the right of your twin gun stops short before it hits the rudder, then there is a little area where both guns are blocked.
As soon as the left gun aim into the free area it shoots again.
Aim sharp over the top of the rudder and its shooting.
This is real cool.
A engineer would never made it like that, cause its too complicated, prone to failure and field crews would manipulate it to get a wider field of firing or simply do a bad calibration while maintaining the guns.
E.g. Junkers had mechanical and electrical blocking systems. In the beginning they simply put bolts in the ring bearing or out masked the gunsight. Later they had electrical interuptor inflicting training and aiming.
They have blocked both guns and made a wider frame around wings and rudder, cause they had to handle dispersion, shaking and wrenching of the fuselage, different G-Loads and certainly the shaking, cramped hands of the gunner, alive wounded or dead.
The gunner on a freehanded gunnerposition had to be careful not to kill his own plane.
This, the higher speeds and the bad handling with oxygen masks made them vanish from the late war bombers
Maybe you better ask for this:
Disable the gun interruptor and enable the self damage.
Then you get the "realism" you want. HarHar