I designed a thread stand to be used with thread cones and cross-wound thread spools (for sewing machines that don’t have horizontal spool pins). To make the stand a bit more substantial, the base can be filled with something heavy, like sand, lead shot, or bearing balls. The conical spool cap has two diameters: wider for bigger spools, and narrower for smaller ones. To make it you need a 3D printer, some glue, and 12-gauge steel wire for the center pin and the arm.
