They take a very long time to cut and longer to finish. I don't have a bunch of these drop parts, and I probably won't be making them for pens any time soon. They are actually pretty expensive to produce. I will explore what other types of shapes might lend themselves to this technique.
I actually make this ring to be the same thickness as a normal ring, just less than 2mm thick. That makes it a pretty tight squeeze to get everything in there. It's a 4 part ring.