Development stage: Work in progress
It measures 30 cm or 12 inch diameter. The discs will be 6 cm apart.
This is a filament spool that can be be mounted on the side of the Darwin. The image is an artistic illustration. When I've refined it an laser cut it, I will also post the final SVG that I have used for it.
If you have suggestions, please let me know.
It was made in Inkscape.