Bullseye - part cooling 4010 fan mount
thingiverse
These fans can be used to attach a 4010 fan to a bullseye petsfang fan cooling duct. The best solution would be to upgrade to a 5015 blower, but in an effort to quiet my ender 3, I bought a package of dual ball bearing 4010 fans. I tested this setup in place of the stock ender 3 part cooling blower with the Petsfang Bulleye. I was surprised by the results - I'm getting similar or slightly better overhangs and bridges with a lot less noise. Here are the specific fans I purchased: https://www.amazon.com/gp/product/B07DB5H6K1/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
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