- Use PathUtil.setProperty instead of direct setattr for schema properties to ensure proper FreeCAD notifications.
- Only update custom shape properties if the value has changed, reducing unnecessary recomputation.
- For SpindleDirection and Material, only update the property if the new value differs from the current value, and use PathUtil.setProperty for consistency.
- This prevents overwriting existing values with defaults and avoids triggering unwanted recomputation.
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