I modeled this cello out in Shapr 3D.  I've included STL files for the cello, cello with bow, and the cello ring holder separately.  If you'd like to adjust things separately you can use the 3MF file to remove more specific parts if you'd like as well.

Print Details

• Prusa MK3S+ 
• Satin sheet
• 0.4 Revo Nozzle
• 0.15 layer height
• 20% infill
• Painted organic supports
• Printed in Printed Solid Jessie PLA