Tronxy X3a stock extruder cover
thingiverse
This revised stock extruder cover utilizes black fiberglass fabric to insulate heater temperature and minimize unnecessary cooling of the heatblock from the heatsink fan. The design is slightly elevated, yet the hotend remains unchanged. I employed PLA HT for this project, which boasts a temperature resistance identical to PETG (70C), so I recommend using either material. Given that Ender 3, Cr10, and Alfawise U30 all feature the same extruder carriage, I suspect this cover will also fit these printers. However, if you have first-hand experience or have tested it on one of these models, please let me know in the comments so I can confirm its compatibility. UPDATE 25-03: A new version of the blower fan mount has been added, featuring a fan that is more directly aimed at the nozzle, adjustable, and secured with screws directly to the cover.
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