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You don't want air directly hitting the nozzle, Air should be hitting the plastic just after its had a fraction of a second to adhere to the previous layer for strength (unless it's PETG or ABS that want no cooling whatsoever). Since the nozzle should always be moving most coolers that focus on hitting it don't cool the print below it well or at all. The opposite is most Fang style coolers- They hit much farther out than this and are designed for higher print speeds. This cooler sends air towards the middle of the ring at a 35 degree angle and uses waste-flow from hot-end fan.
How was your print quality killed?
Diagnostic feedback would be nice.