Airsoft FAST PJ helmet FAN 25mm mount

This is the 25mm fan mount for Airsoft FAST PJ helment which I've done because foggy glasses are sometimes sooooo anoying. To mount it You need to cut a part of your helment and make some battery box at the back. I'm using PWM regulator with 18650 battery. The fan angle can be adjusted and then locked by screws. It's not so perfect but it is working in my case. It contains two versions of fan cover (with and without grill).

Note: for some reason I'm not able to laod video (3gp), I will try t