Pico-extruder

/!\ WARNING: my cheap MK8-type drive gear is unreliable, stripped filament with retraction - adapt model for use with other drive gear types?

Tiny, single printed piece bowden extruder; smallest I have seen.

I designed this because I wanted a very small, elegant extruder design which could be made from as few components and as quickly as possible.

This outperforms the generic all-metal extruder I had previously been using.

Parametric

Default settings for:
- 1.75mm filament
- Sta