jd94
awesome work!
I present to your attention a universal card holder. From this set of parts, you can assemble the original holder for 4, 6, 8, 10 or 12 plastic cards. If you use a 4 or 6 card holder, you can print a smooth back cover, or you can print a cover with a clip. Thanks to the lever, the cards are easy to get in the form of aladder. All parts are adapted and do not require support when printing, and if the adhesion to the table on your printer is good, then you can not use the brim.
I recommend using PETG or ABS plastic for printing. Layer thickness 0.2 mm