Here's a second version of my Waves spinner. I reduced the distance of the satellite bearings from the center, so the overall spin radius is reduced by ~5mm to make this work also for smaller hands. The overall look still resembles the original Waves spinner very closely. To better preserve the rounded edges I recommend printing the split design, then glue the 2 halves together, or just rely on the friction of the bearing outer surface to hold the 2 halves together.

The attached picture shows the 2 versions for comparison. Original Waves spinner is on the left.