To make the DIY memdex holder you will need chipboard, cardstock, something to cut circles, and one round chopstick or dowel. I suggest a 1 3/4” circle punch, 1 1/2” circle punch, 1/8 circle punch (or Crop-a-dile) or nesting circle dies.
Cut eight large chipboard circles, mark the center, and punch a hole in the center that matches the circumference of your chopstick or dowel. Make two stacks of four each and glue those stacks. Test the depth of your chipboard and cardstock stack with a card, since the weight of your materials may be different than the weight I’m using.
Punch the medium circle from cardstock, then punch the large circle around that hole to make rings. Punch 20 rings. Make four stacks of five each and glue those stacks.
Attach the cardstock rings to each side of the chipboard stacks. Thread onto the chopstick.
The holder is a tissue box cut in half, the two halves glued together, with a vertical channel to hold the chopstick. The tissue box is 4 1/2” wide, which is wider than most commercial Rolodex holders.
Short video: https://youtu.be/9l1tSW6grfM
Papercraft Crystal 