[DeeZire]

Why would you want to increase a units sight range? Most of them can see around 15% of the map anyways.

Yes, two turrets is straightforward enough - you declare your second turret in the same module as the first turret;-

Behavior = AIUpdateInterface ModuleTag_[name]
    Turret
      ControlledWeaponSlots = [PRIMARY/SECONDARY/TERTIARY]
    End
    AltTurret
      ControlledWeaponSlots = [PRIMARY/SECONDARY/TERTIARY]
    End
End

Then make sure all weapons in each WeaponSet are assigned to firing from the correct bone on the model in all of its ConditionStates.