Flashforge Finder External spool Holder

Due to the limitation of the spool dimension on the Flashforge Finder, I have decided to design an external spool holder. Every 1kg of filament could fit with this design.Every part on this design can be print with the Flashforge Finder.No glue is needed.For the Assembling:Place the "center" part into the joint parts (Picture1_model), then place the top part (Picture2_moedl) and finish by the feet part (Picture3_model).