On a whim, I picked up a crowquill pen at the art store. (BORING ART-SUPPLY NERD TALK AHOY):

I’d briefly played with one many years ago, but ditched it in favor of the Speedball pen points I was used to. But I’m diggin’ it now! It’s nice to have that amount of control, and it doesn’t take all my concentration like the brush.
You might also like:
Crowquill | 2006 | pen and ink