What is a dart? Does it affect the sound and/or playability of the guitar?
The term dart refers to the carved volute at the transition from the barrel to the headstock of the instrument on certain models of guitars. It was originally integral to the glue joint of the headstock to the neck, but now with one piece necks it is simply a design element. Generally it doesn’t affect the tone or playability except in serving as a thumb stop. It may strengthen the transition area somewhat, but broken off headstocks are uncommon on SCGC guitars of all kinds as a result of the fact that the truss rod does not extend through that weaker transitional area.