Manual guitar string winder.

Half round profile knobs.

Included a blank arm in case you like the design, but need to mold in a different shape.

No glue or screws needed. 

Don't really need support, but I did this in ABS, so no fan, and some little tree support for the curved edges, made it look nicer. 

.2 Layer Height

.4 line width (makes the threads fit better)

4 walls, 30% infill.  or just go solid...