This is a small solution for quickly and easily converting a Direct extruder that would normally work with a Hotend Groovemount to an extruder Bowden. It simply mounts like a HotEnd, but allows PTFE tubing to be connected into a built-in bowden coupler.
Simpler than forcibly screwing a threaded bowden coupler into a molded hole, it allows you to use excellent Direct extruders available in a Bowden configuration.
If you are designing your own extruder Bowden, you might consider using it to secure the PTFE instead of a screw in coupler.