Until a better filming situation can happen, I can only upload a quick demo of these water brush x dip pen nib mods I've been working on for a while. More info in the vid comments, etc
Pentel Aquash work out the best for these Fountain Pen Revolution 6.3mm ebonite feeds. Zebra G-Nib is a famous dip pen nib used for certain fountain pen mods already... IDK I've got gripes with certain pen makers, so this was a DIY solution that most could use (hopefully!).
Some other water brushes could work, but they might require epoxy clay or something similar for extra support.















