After that, the modeling was fairly straightforward--I simply made a circle in Fusion, created the slots using line and arc tools and mirroring them across center axes, and then extruded the sketch. For the sand dollar engraving, I used splines and mirroring to sketch the shapes, and then cut that halfway into the holder. After that, I sent the STL file to the NVBots queue, and it printed without issue on the first try.