Not a good idea IMO since;
If a base turret can't Turn 360 degrees, then where is the reason for the multi-part turret?
Even the turrets on battle-ships have at least FOV or FOF (field of fire) of 180 degrees.
As a ship-designer I would not be wasting space on a technically inferior turrets. But use the best turret I could use.
And why waste precious space on narrow angle weapons when you can have god like angle weapons.
If a bomber can have a 360-degree turret, then so can all other ships.
By the way, the turret on your ship (bomber) will aim for target you are targeting so no needs for an extra targeting box, as read in that other thread.
Single Part turrets, you can already do that
just use your imagination a little tiny bit

.
Blind fire turrets?. Why use blind fire for turrets? Does this not count out the reason for the turret it-self?
Just my 2 cents.