Hyundai/Kia/Nissan parts-drilling returned a NOT_LOGGED_IN_DEMO page on the tr account (license-gated), so live drills yielded 0 parts even though the tree loads. After the tr re-auth retry still demos, try the de account once; if it serves real (non-demo) content, use it. Tests whether de holds the brand license. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>