I have included two Vent Flaps.
Vent Flap 1
Changed airflow direction as it directly heated the left hand panel causing localised warping.
Vent Flap 2
Same airflow as the original but includes the fixing modification.
Hinge
The hinge has been lengthened as you no longer attach the servo to the M4 bolt.
The Servo Arm is required to fix the arm to the Flap. An M3x18 is required including the SG90 fixings.
Print all as before. 100% infill with ABS/ASA.
The author remixed this model.
Adapted the Vent Flap to a more robust, albeit less beautiful design.