I redesigned this from scratch to create a looser fit for the markers. I had to keep increasing the filament thickness on the old design to fit markers or drill out the holes. This new design should prevent this but the markers might be a little too loose now :)
Remember to come back and post what you've printed as Make.
It's good for the designer and the community (that means you)!
To post a Make, come back to this Thing and click Post a Make.
Or, you can use the Thingiverse Mobile app found on
and the Apple App Store.