Ender-2 Part cooler 40mm axial fan

A Part cooler for Ender-2, -3 CR10 that uses a quiet axial fan. I use an old Revoltec Air Guard 40x40x10mm fan with the following spec:
12v
5000rpm
5.20 CFM

Air flow with out Pressure booster ~1.1 CFM
Air flow with Pressure booster ~1.4 CFM
Measured with PM6252A anemometer. The air flow is low so not very accurate readings.
There is a little to much resistance for this low power fan. I'm sure a thick 40x40x20mm fan like Akasa AK-4020MS will do a much better job.

The fan is mounted v