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     "offset_deg": 1.4033418597069752e-14,
     "offset_mm": 5.438561595923361e-15
    },
    {
     "sector": 7,
     "offset_deg": 1.4033418597069752e-14,
     "offset_mm": 5.38800617923363e-15
    }
   ],
   "outline_slot_symmetry_order": 2,
   "symmetry": "approved_sector_pattern",
   "frame_fit_verified": true
  },
  {
   "type": "P07",
   "node": "6",
   "centres_drawing_mini_mm": [
    [
     10.278260339744413,
     19.792760741916133
    ],
    [
     -19.245975109927233,
     11.268915486575974
    ],
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     19.86802705413738,
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   ],
   "count": 4,
   "min_hole_web_mm": 3.079999931371545,
   "max_shoulder_lever_mm": 7.217954971898808,
   "minimum_rib_axis_clearance_mm": 6.772687513487166,
   "sectors": [
    {
     "sector": 1,
     "offset_deg": 0.0,
     "offset_mm": 0.0
    },
    {
     "sector": 3,
     "offset_deg": 0.0,
     "offset_mm": 0.0
    },
    {
     "sector": 5,
     "offset_deg": 1.4033418597069752e-14,
     "offset_mm": 5.4137043001936626e-15
    },
    {
     "sector": 7,
     "offset_deg": 1.4033418597069752e-14,
     "offset_mm": 5.413704234535994e-15
    }
   ],
   "outline_slot_symmetry_order": 2,
   "symmetry": "approved_sector_pattern",
   "frame_fit_verified": true
  },
  {
   "type": "P08",
   "node": "36",
   "centres_drawing_mini_mm": [
    [
     -20.51012857142857,
     -8.49556857142857
    ],
    [
     8.49557142857143,
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     20.51012142857143,
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    ],
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   ],
   "count": 4,
   "min_hole_web_mm": 3.084610518374477,
   "max_shoulder_lever_mm": 7.003089192978809,
   "minimum_rib_axis_clearance_mm": 6.995568571428567,
   "sectors": [
    {
     "sector": 5,
     "offset_deg": 1.1561809060951029e-05,
     "offset_mm": 4.4797745801520225e-06
    },
    {
     "sector": 7,
     "offset_deg": 4.749145408788516e-06,
     "offset_mm": 1.8401187751335193e-06
    },
    {
     "sector": 1,
     "offset_deg": 2.305598925880492e-06,
     "offset_mm": 8.933343254656974e-07
    },
    {
     "sector": 3,
     "offset_deg": 4.507066396073229e-06,
     "offset_mm": 1.7463214765012755e-06
    }
   ],
   "outline_slot_symmetry_order": 16,
   "symmetry": "approved_sector_pattern",
   "frame_fit_verified": true
  },
  {
   "type": "P09",
   "node": "41",
   "centres_drawing_mini_mm": [
    [
     1.560734047256472e-10,
     21.656585999999997
    ],
    [
     -15.462184637664734,
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    ],
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     15.46218463766451,
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    [
     0.0,
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   ],
   "count": 4,
   "min_hole_web_mm": 3.0600000743908593,
   "max_shoulder_lever_mm": 11.142852711266999,
   "minimum_rib_axis_clearance_mm": 7.96162876653004,
   "sectors": [
    {
     "sector": 1,
     "offset_deg": 0.0,
     "offset_mm": 0.0
    },
    {
     "sector": 2,
     "offset_deg": 0.0,
     "offset_mm": 0.0
    },
    {
     "sector": 4,
     "offset_deg": 3.1805546814635168e-15,
     "offset_mm": 9.43689570931383e-16
    },
    {
     "sector": null,
     "offset_deg": null,
     "offset_mm": null,
     "position": "node_centre"
    }
   ],
   "outline_slot_symmetry_order": 2,
   "symmetry": "approved_sector_pattern",
   "frame_fit_verified": true
  },
  {
   "type": "P10",
   "node": "49",
   "centres_drawing_mini_mm": [
    [
     -12.331938571428573,
     -12.331938571430143
    ],
    [
     12.33194142857143,
     -12.331938571430143
    ],
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     12.33194142857143,
     12.33194142856986
    ],
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     -12.331938571428573,
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   ],
   "count": 4,
   "min_hole_web_mm": 3.0775331094853877,
   "max_shoulder_lever_mm": 10.83292369860317,
   "minimum_rib_axis_clearance_mm": 10.831927727895689,
   "sectors": [
    {
     "sector": 2,
     "offset_deg": 3.6376771122821655e-10,
     "offset_mm": 1.1072555497392333e-10
    },
    {
     "sector": 3,
     "offset_deg": 6.637683134951409e-06,
     "offset_mm": 2.0204136082262687e-06
    },
    {
     "sector": 4,
     "offset_deg": 3.6368370560662727e-10,
     "offset_mm": 1.1070001054271026e-10
    },
    {
     "sector": 1,
     "offset_deg": 6.637682993695802e-06,
     "offset_mm": 2.020413565229872e-06
    }
   ],
   "outline_slot_symmetry_order": 8,
   "symmetry": "approved_sector_pattern",
   "frame_fit_verified": true
  }
 ],
 "clamping_levers": [
  {
   "old_type": "P01",
   "new_type": "P01",
   "before_mini_mm": 3.5756458887652594,
   "after_mini_mm": 11.395594797464925,
   "ratio": 3.1870031742433107
  },
  {
   "old_type": "P02",
   "new_type": "P02",
   "before_mini_mm": 3.5428629325559595,
   "after_mini_mm": 10.088275542670262,
   "ratio": 2.8474924756381097
  },
  {
   "old_type": "P03",
   "new_type": "P03",
   "before_mini_mm": 3.542859165374259,
   "after_mini_mm": 7.25835654807988,
   "ratio": 2.0487285012677394
  },
  {
   "old_type": "P04",
   "new_type": "P04",
   "before_mini_mm": 3.5117245591428614,
   "after_mini_mm": 8.474679369138764,
   "ratio": 2.4132528694697104
  },
  {
   "old_type": "P05",
   "new_type": "P05",
   "before_mini_mm": 3.5428451317497216,
   "after_mini_mm": 10.804681694562014,
   "ratio": 3.049718882074265
  },
  {
   "old_type": "P06",
   "new_type": "P06",
   "before_mini_mm": 3.5428575386429246,
   "after_mini_mm": 7.430556627020443,
   "ratio": 2.0973342975192515
  },
  {
   "old_type": "P07",
   "new_type": "P07",
   "before_mini_mm": 3.5428575876558903,
   "after_mini_mm": 7.217954971898808,
   "ratio": 2.037325744350487
  },
  {
   "old_type": "P08",
   "new_type": "P08",
   "before_mini_mm": 3.664958332532694,
   "after_mini_mm": 7.003089192978809,
   "ratio": 1.9108236868109976
  },
  {
   "old_type": "P09",
   "new_type": "P09",
   "before_mini_mm": 3.5602560144041995,
   "after_mini_mm": 11.142852711266999,
   "ratio": 3.1297897303409874
  },
  {
   "old_type": "P10",
   "new_type": "P10",
   "before_mini_mm": 3.682420071591142,
   "after_mini_mm": 10.83292369860317,
   "ratio": 2.9417946589462174
  }
 ],
 "all_refined_nodes_single_plate": "P10",
 "construction_ready": false,
 "physical_fit_verified": false,
 "structural_capacity_verified": false,
 "limitations": [
  "Optimization is a feasible local class-merging search, not a proof of the global minimum number of types.",
  "End interchangeability retains the outside/top edge; top and bottom are not interchangeable.",
  "Sector holes increase distance from rib shoulders; no reduction in bending stress or increase in capacity is claimed. Bolt preload and plate bending require a separate structural check.",
  "No prior strength report is valid for this changed topology without recalculation; neither plywood properties nor actual screw preload are measured."
 ]
}