Spiro Remix

This is a 50% scale version of the original with added thickness to make it more rigid. 

Spiral sprocket is 3mm thick and outer ring is 7mm thick, this makes drawing spirals easier as there is less wobble and better engagement between the gears. 

Recommend printing at 100% infill to give it some weight.  

NEW - Changed gear to have recess in the middle, helps with thicker pens/pencils. 

This is a 50% scale version of the original with added thickness to make it more rigid.