MiniStruder V0.3

A direct drive extruder based on a single printed part.
This extruder is part of the StrongPrint the Metal 3D printer http://www.thingiverse.com/thing:329498
Designed in OpenScad to:
- Be compact & provide a good drive of the wire.
- Be parametric for different wire diameters.
- Be parametric for drive wheel diameter.
- Be extremely easy to implement
- Use the flexibility of the plastic.
- Have a good hold of the wire & to be able to handle flexible wire