[Inkscape-user] Other pen "shapes" for caligraphy tool?

Is there a way to change the shape of the calligraphy tool "nib". I found the setting for capping the end (can't remember what it was called) to mimic a round tip (at the end of the strokes. What I was hoping to do was emulate a split or notched tip to get parallel strokes that respect the stroke weight and gravity.

-Rob A