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STL file seems to be incomplete or corrupted. However, the Repair function of my printer software corrected that.
Bridging the upper plane was too challenging for my printer, an UP! Mini. Some fibers dropped down. As you already included a cone, this should go further inwards.
Nevertheless, the shape was tight enough to work fine (and loud).
However the typical sound from the ball is missing. Maybe the ball is too big or its shape not round enough.
Still a good experience.