Core One PTFE Bowden Tube Connector Mod

tl;dr This is a modified side handle for the CORE One, designed to integrate a PC4-M10 fitting. This allows you to quickly connect PTFE Bowden tubes, e.g. for connecting an external drybox or spool holder.

Using the mod

• To connect a PTFE Bowden tube, simply push it in the PC4-M10 connector. Be sure to push it all the way in until you feel resistance (about 2.5 cm).
• To disconnect, press the black ring on the connector and pull the tube out.
• Feeding the filament into the printer without using a PTFE Bowden tube will also work just fine!

What you need

• PC4-M10 fitting (Amazon.com or Amazon.de)
• 2x M3x8rT screws (from the orignal handle)

Print recommendations

• Print with Prusament PETG Prusa Orange to match the color and sturdiness of the original side handle
• Gyroid infill 
• No supports needed

WARNING: Do not install the PC4-M10 fitting before screwing the handle to the printer. Otherwise, you will not be able to because the fitting will cover the screw hole.

Installation instructions

Remove the original side handle on the right side (including the short PTFE tube) by unscrewing the two M3x8rT screws.
Install the modified side handle by reusing the two M3x8rT screws.  Make sure the screw holes align with the holes from the filament sensor on the inside of the printer.
After installing the new handle, you can screw in the PC4-M10 fitting with a M10 wrench - make sure it is angled correctly! TIP: The Uni-Wrench included with the Core One can also be used to tighten the PC4-M10 fitting.

(Credits: The first two pictures in the installation instructions are copied from the official CORE one instruction manual)