I’ve designed 2 more items, both jewelry, and had them 3D printed.
The other is a necklace that says Lucky (for a family member with that nickname). Made out of sterling silver, I added the chain. Also designed on Tinkercad and printed by Shapeways.
Both came out well. I’m having a bit of trouble figuring out size; even though I have a ruler in front of me while I’m working, I still keep making things too big or too small. The next time I make the cufflinks, I need to make the T longer, to prevent them from falling out.