Bowden Extruder for Nema 17 w. Planetary Gearbox

My extruder design for my delta printer build. I'm using a Nema 17 stepper motor with a 5.1 planetary gearbox, which works really well. No skipping steps, no grinding filament!

In addition to the motor it uses a MK7 hobbed gear, two 10x3x4 mm bearings, four M3 screws, a M4 screw, a M4 nut, aM4 bowden coupling and a 10-15mm spring.

I had to print a washer and put it onto the gearbox in order to fit everything nicely, you might not need it. The bottom part is used to attach the extruder to a