Solder smoke fan

Have had an open 80mm 12 volt PC fan on my desktop for years while soldering.
I have now improved it (?) with this design.
As filter I use a kitchen fan carbon filter, 100x100x14mm.
I dont know if there is any point with this nozzle, but it looks good.
A 80mm 5 volt fan with USB feed would be perfect for desktop use.
8 pc. M4x10mm skrews + nuts + washers