I was reading an August Newsweek about the slaughter of Mountain Gorillas, and this jumped out.
I also learned that brush pen takes a while to dry. Smudgey eraserness.
Here are the stats and what it looks like.
Staedler Mars GRAPHIC 3000 Duo
You probably already know this list and there are tons of others.
All Amazing inkers
Study their drawing as much as you check out their inks.