Airflow is fixed when a USB-connected 5V 5015 fan is installed. If necessary, the airflow of the stock fan can be lowered for quieter operation. Quality improvement can be expected when ambient temperature is high.
If you want more informations, please visit my blog.(Japanese, please translate it.)
Note: M3 screws and insert nuts are required for installation. If you want to use other screws, modify the STEP file.
The author remixed this model.