I have built custom tags - square, so that I can use the CD covers. I didn’t like the round version so much and the figures from the 3D printer aren’t my thing either. The square capsules are more expensive, but for me personally it was worth it.
I used the square QUADRUM coin capsules from Leuchtturm (the normal ones, there are still Mini and High, although production of the Mini will soon be discontinued).
The matching foam inlay is included and since 2023 the QUADRUM capsules have also been available with a 10 mm cut-out - making them perfect for use with 10 x 3 mm magnets. For better durability on the box, I would possibly recommend 12 x 3 mm for these capsules, but I have not tested this in relation to the antenna.
The inside dimensions for the covers are 43 mm or a maximum of 43.5 mm square, in case anyone wants to rebuild the tags.
For the back, I used the title again or, for series with several episodes on a custom tag, the title lists as well (for Benjamin Blümchen, for example, there are always 10 episodes on a tag).
Leuchtturm also offers matching storage cases - ours fits 150 of the QUADRUM capsules. So the capsules don’t fly around everywhere.
The only drawback is that the capsules don’t close as tightly as the round version, so I’ll have to come up with a solution for that. But for now, I’m very happy with this version.
And cheers to the filter for the last tonie played in the Teddycloud - it REALLY made my work easier when assigning 100 custom tags…!