GREEN MAMBA V1.3/V2.0 extruder

This is extruder head for Green Mamba V1.3/V2.0 DIY 3D printer in OpenScad. more info: http://www.optolab.ftn.uns.ac.rs/index.php/education/project-base/211-diy-3d-printer printer: https://www.youtube.com/watch?v=jDCqzzHqFrU Green Mamba DIY 3D printer V1.2: https://www.thingiverse.com/thing:3059679 Green Mamba DIY 3D printer V1.3: https://www.thingiverse.com/thing:3727407 Green Mamba DIY 3D printer V2.0: https://www.thingiverse.com/thing:3260169 All parts are easy to print.