Anet A8 Circular Extruder Fan - lowered (various lengths)

Thanks Arjjck for the Hesine M-505 design!
I tried several circular extruder fans on my A8 but a lot seemed to be cooling the extruder itself and causing my temps to fluctuate so I decided to get the fan as low as I could to help minimize this. I attacked Arjjck's design with my limited knowledge of Meshmixer to extend the ring down and these are the results.
On my machine the 3mm (pictured) is very close to the bed/print and works well. The 4mm extension would probably scrape against my bed