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Editing Step 17 —

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Carefully loosen the locking nut from the knurled PTC assembly

Unscrew the knurled PTC assembly from the top of the hotend

The PTFE liner inside the hotend chamber might come out with the PTC assembly. If this happens, just insert it back in place

This dual extrusion kit comes with an extra PTFE liner for your hotend. You don't have to replace it, but this gives you the option of replacing it during this install if you so choose.

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