(See what I did there? Puntastic...)
Ok, in response to an email, here's my tool of choice:
I use a Daler Rowney Sapphire Brush (series 51) either a size 0/10 (if I'm feeling confident and it's a good brush) or a size "2/0" which is what I'm favouring right now- they're "rigging" brushes - designed to paint rigging on paintings of boats, so long and very, very fine. I've met people who get the heebie jeebies just looking at them

I tend to tell people to buy a bunch of brushes and try them out - John McCrea once recommended (and gave me) a brush that was also a rigging brush, but it was so long that I just couldn't get my head/hand around it and threw the brush down in dispair never to pick one up again for a couple of years.
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Now, I do a fair bit of digital touch up - adding borders, sometimes throwing some effects down, etc, but, for the most part the brush is the only thing I use when I ink a page - (dipped in indian ink). Sometimes I have good days and sometimes bad days. On the bad days I hit the dip pens...
Ok, what you got?
-pj