Card Storage Divider With Customizable Text and Dimensions

Changelog

8/11/26:

• Added vertical-oriented divider STLs. Includes all sets up to Reality Fracture and The Hobbit (see .zip file)

• Portrait by default — 64 × 94 (was 94 × 64)

• Rounded body and tab corners (cornerRadius, tabCornerRadius, cornerFn)

• Separate tabThickness so tabs can be sturdier than the body

• Filleted joint where tabs meet the body (filletRadius, filletFn)

• Tabs auto-expand to fit their text — tabWidthL/tabWidthR are now minimums (autoTabWidth, tabTextSlack, tabGapMin)

• Preset tab slots so a row of dividers can stagger their tabs (tabSlotCount, tabSlotL, tabSlotR)

• Fonts load from a local fonts folder via relative use <> — no system install needed

• ~6.7× faster rendering (79.5s → 11.9s)

• Echoes resolved tab widths and spans, with overlap/overflow warnings

Background

I wanted a card divider that I could easily modify to change the tab text, and even add MTG set and color symbols to avoid using labels. I found Zlomy's OpenSCAD model on Thingaverse (https://www.thingiverse.com/thing:3329096) which was a great start, but wasn't quite what I wanted. I made a bunch of updates to it to better fit my needs, reduce print time/filament by changing to a hex grid, and add more documentation in the .scad file, and it works great! 

Maybe the end-all solution for card dividers?

Features

• Fully customizable divider length, width, height, and thickness

  • Default values are for horizontally-stored cards in BCW-style cardboard storage boxes

  • Easily change to vertically-stored, or any other custom size (anyone got old library card catalog shelving? that'd be sweet!)

• Customizable tabs

  • Left tab, right tab, both, none

  • Tabs are independently configurable for length/width to fit whatever text you need

• Add text to tabs using any font

  • Add text to either tab using any font on your computer

  • Add MTG set, card, or mana symbols using the awesome font packages from Andrew Gioia (see below for instructions on installing the fonts)

  • Leave tabs blank if you would like to add your own labels

• Tweak the hex grid to your liking

Requirements

• OpenSCAD https://openscad.org/

• BOSL2 OpenSCAD library https://github.com/revarbat/BOSL2 (used to render hex grid. installation instructions provided in the link)

• (Optional) MTG Font packs from https://mana.andrewgioia.com/ (for mana/card ability symbols) and https://keyrune.andrewgioia.com/ (for set symbols)

Install MTG Set/Mana Fonts

The model uses two fonts by Andrew Gioia, both licensed under SIL OFL 1.1:

• Keyrune (set symbols): https://keyrune.andrewgioia.com/

• Mana (mana symbols): https://mana.andrewgioia.com/

Download the font files from:

• https://raw.githubusercontent.com/andrewgioia/keyrune/master/fonts/keyrune.ttf

• https://raw.githubusercontent.com/andrewgioia/mana/master/fonts/mana.ttf

You can supply them either way:

Option 1 -- keep them next to the .scad (recommended). Create a fonts folder beside customizable_card_storage_divider.scad and save both .ttf files into it, so you end up with fonts/keyrune.ttf and fonts/mana.ttf. The use <fonts/*.ttf> lines resolve relative to the .scad, so nothing has to be installed and the fonts travel with the model.

Option 2 -- install them system-wide. Install both .ttf files like any other font, then comment out the two use <> lines near the top of the .scad. Leaving them in without a fonts folder still renders, but OpenSCAD logs a "Can't read font with path" error on every run.

***IMPORTANT*** In Windows, OpenSCAD requires you to install fonts for ALL USERS in order to use them. Ensure you do this! Search google if you need help!

Either way, input either "mana" or "keyrune" into the fontL or fontR parameters depending on which font you'd like to use. Then use andrewgioia's cheat sheets (see links below) to copy/paste the desired symbol into the textL or textR parameters.

If everything was installed and configured properly, you should see the set symbols rendered in OpenSCAD!

Cheat sheets can be found here:

• https://keyrune.andrewgioia.com/cheatsheet.html

• https://mana.andrewgioia.com/cheatsheet.html

Print Settings

I can only comment on print settings for the default parameter values since that is what I use myself and have found optimal.

• Any filament

• .2mm layer height

• 2 perimeters 

  • You can go up to 6 perimeters to make it print a bit faster but it will create more blobs/messiness due to tiny gaps that the slicer attempts to fill. You could likely mitigate this by tweaking hex grid widths if desired.

• Slow down your External Perimeter print speed for higher clarity text/set symbols. I have mine at 10mm/s for PETG/PLA which gives good results

• I can print 6 dividers at a time in ~2.5hr with the above settings on my Prusa i3 Mk3s+ (using 6 perimeters shaves off about 20min)

• Use an opaque and non-glossy filament for best readability of text/symbols

• No supports needed

• Wait for the prints to cool before removing them from the print bed! Due to how thin they are, they will be fragile til they are cooled.

Notes

• The default divider thickness and hex values provided seem to work well and minimize print times.

• I will upload any .stl files that I make for my own collection as a .zip file.

GitHub project can be found here https://github.com/tony-box/customizable_card_storage_divider