About this 3D model

I had build my Huxley, However I have not yet to study how can make a Bowden Extruder working. So, I designed this simple 12V DC Gear Motor Extruder for anyone who making Huxley now, The Extruder don't need any addition clamp parts, it just need screw it on Huxley parts "x-carriage-upper_1off"