Filament spool insert

thingiverse

I designed inserts to enhance the smoothness of movement on my kossel while printing, as the filament was wobbling slightly. I utilize this filament holder: https://www.thingiverse.com/thing:2476209. It might work with other holders too, feel free to share your experiences in the comments. The tight insert measures approximately 19mm internally, and the regular one is around 22mm. Version 1 fits perfectly on spools from "Clas Ohlson", measuring about 52.8mm. Versions 2 and 3 should fit randomly sourced Chinese spools; just measure them first for confirmation. A low infill percentage of 1-2% seems sufficient if the material is evenly distributed, ensuring a smooth print.