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No problem, for a fully stock Ender-3 (and no ABL) you will want to print the following STL files:


This will reuse your existing OEM fans with the Hero Me Gen2.

If you want a better parts cooling solution for low cost. Then get a 24v 5015 radial fan from www.TH3DStudio.com and print

Hero_Me_Single_5015_Duct_Gen2e.stl (instead of the OEM 4010).