I found several versions of a neat pen/pencil holder that I wanted to use for my model-painting acrylic markers. I found a version on Thingiverse and used the Customizer to adapt the original 12-pen holder into a 24-pen and 12-pen holder that I then merged and scaled to fit the diameter of the acrylic markers that have been sitting in their original packaging for six months (14mm diameter). I also shortened the holder to consume less filament and added a bowl in the center for odds and ends.
Printing was quite simple: no supports, I used .15mm layer height (but I would guess that the broad tolerances would enable using almost any resolution).
The author remixed this model.
I used the Customizer to adapt the original 12-pen holder into a 24-pen and 12-pen holder that I then merged and scaled to fit the diameter of the acrylic markers that have been sitting in their original packaging for six months. I also shortened the holder to consume less filament and added a bowl in the center for odds and ends.