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A customer of ours provided this method for replacing the V4 hotend heatbreak on the MakerGear 3D printers. Please note: a new nozzle is recommend when installing a new barrel. Here is what MakerGear says:"Once a new nozzle has been installed onto a barrel, do not install that same nozzle onto a different barrel or leakage may occur. As you install a new nozzle onto a barrel, a small amount of material is removed from the nozzle to create a custom fit. This makes the nozzle incompatible wit …