K1 Extruder with Filament Runout Sensor (remixed)

Print these parts as orientated in ABS or ASA, one of each. Supports maybe needed at the round PTFE mount. Goto Henlor's post for parts requirements. Install the enforcing ring over the PTFE mount before installing the PTFE coupler, the tapered end of the ring down. Remove the white PTFE coupler from the current K1 extruder shell by using a very small flathead screwdriver in the hole just under the PTFE coupler, then a razor-blade knife under the coupler's metal edge and slowly pry around until it comes out. 📷 Image redacted — claim this model to add your own media Next, press the coupler into the new shell; large channel lock pliers work great. Goto Henlor's post for the rest of the installation instructions.