Funnel remix for AirManger v2 with BFB1012M fan

The funnel (exhaust duct) included with AirManagerV2 doesn't work with this BFB1012M fan (which is available for purchase in the US):

https://www.amazon.com/gp/product/B0BX3Y322X/

This remix fixes this problem 🤓.

You'll need longer M4 screws to secure the fan inside the blower housing. The M4 x 40mm were barely long enough for a standard M4 nut. I'd recommend, instead, M4 x 45mm (especially if you're using the recommended nyloc nuts).

Be sure the length of your DC jack doesn't interfere with the fan as it protrudes inside the blower housing. In my case, I found I had to add a nut on the external side of the DC jack to create enough clearance inside the housing for the fan to fit.

Adapted the funnel (exhaust duct to work with the BFB1012M fan.