Sunlu Spool V3 Center Sleeve and Cup (Parametric)

A simple sleeve and cup for the center hole in Sunlu V3 1kg spools (56mm diameter interior hole). The included FreeCAD file is parametric, so you can adjust the heights and widths of the lips, the walls, the sleeve, and the cup. The full diameter is a read-only parameter, but can be made editable in FreeCAD to fit other spools.

Includes a second plate with a full-sized cup, no sleeve, since the sleeve is largely unnecessary. It was mostly for practice fitting multiple objects together in FreeCAD, but stands as an aesthetic choice.

Note about supports: Printing the cups bottom-first uses ~2g less filament, but may result in rough edges for the bottom of the lip. Printing them top-first (as arranged by default) results in a smooth lip but a rough interior bottom surface. I went for top-first since the inside of the cup will get scratched up from repeated use anyway.