Summary

Filament is easy to change

Used teflon tube: http://amzn.to/2kZfzbM

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/9fufzsuQyvo

Print Settings

Rafts:

No

                                            <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.2</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>80%</p></div></p>

Anet A8 Filament Guide