Spline import now uses SplineConverter (arc-based) so the configurable precision parameter is obsolete. Removed the setting from the options dialog, DxfImporter property, Settings files, and all callsites. Hardcoded 200 as the sampling density for the intermediate point evaluation that feeds into SplineConverter. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>