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Only when printed in the wrong orientation. Print the cooling ducts with the front face of the duct down flat on the build plate. This will give the strength needed for the wing that holds the 5015 fan. Use supports, but only from the build plate. For the most updated versions with plenty of improvements, be sure to check out: https://www.thingiverse.com/thing:3182917

Hero Me Gen3 - CR-10/S Ender 3/Pro/5 OEM Hot-end