This is a super-simple, compact bowden extruder design. It is a direct-drive design, using an MK8 drive gear and a 625 idler bearing. This extruder has been designed to be highly accessible and easy to source; it uses just 2 bolt lengths and uses binder clip arms to tension the idler arm.Currently, the extruder fits the 10mm bowden coupling included with E3D hotends. Additionally, the extruder mount works well with 15mm aluminum extrusion.