One-Up / Two-Up Bowden Extruder

NOTE: NOT FULLY TESTED YET - YMMV

A Bowden extruder design for use with the One-Up/Two-Up printer models from QU-BD. Supports the Ubis-style hot-end that ships with those printer kits as well as "Groove-mount" style hot-ends such as E3D and Pico.

Designed to work with my mechanical endstop bracket set (the left edge of the extruder has a bumper for tapping the X endstop).

Has a mounting shelf and ventilation duct for a high-airflow "blower" fan as well as a mounting point for Z-Probe se