From the Sketchbook - Brush Experiment
I still don't know how to use these brushes correctly, but I kind of like the way this piece turned out. 

I am not saying whether or not this picture illustrates an event from the current story. It's not a spoiler, it's just a thing I drew for practice.

Technical note: the brush I'm using is a brush-pen, but the "nib" is an actual brush, with camel-hair bristles. The biggest difference between this particular brush pen and a simple brush is that I'm far too irresponsible to be allowed to have an open pot of ink in my office.