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          "source_xy": [
            616.7390543619791,
            407.6571044921875
          ]
        },
        {
          "image_id": 20,
          "source_xy": [
            745.669189453125,
            155.1115519205729
          ]
        }
      ]
    },
    "1352": {
      "engine_mm": [
        153.46322397737197,
        116.97587289452416,
        335.6167960128757
      ],
      "source_observations": [
        {
          "image_id": 4,
          "source_xy": [
            1780.191853841146,
            1957.4609375
          ]
        },
        {
          "image_id": 3,
          "source_xy": [
            757.3020833333333,
            463.65201822916663
          ]
        },
        {
          "image_id": 20,
          "source_xy": [
            1086.46484375,
            305.7483723958333
          ]
        }
      ]
    },
    "1375": {
      "engine_mm": [
        79.76175432750267,
        126.3468346047616,
        317.69404398175146
      ],
      "source_observations": [
        {
          "image_id": 3,
          "source_xy": [
            611.4654134114583,
            413.4069417317708
          ]
        },
        {
          "image_id": 4,
          "source_xy": [
            1451.1492919921875,
            1903.1099446614585
          ]
        },
        {
          "image_id": 20,
          "source_xy": [
            730.990234375,
            173.634033203125
          ]
        }
      ]
    },
    "1376": {
      "engine_mm": [
        89.51438622038765,
        134.02665490556927,
        305.6145088316326
      ],
      "source_observations": [
        {
          "image_id": 3,
          "source_xy": [
            634.5518798828125,
            385.3509114583333
          ]
        },
        {
          "image_id": 4,
          "source_xy": [
            1488.6747233072917,
            1833.641560872396
          ]
        },
        {
          "image_id": 20,
          "source_xy": [
            796.5101725260416,
            90.7208760579427
          ]
        }
      ]
    }
  },
  "local_hose_surface_ids": [
    787,
    789,
    916,
    917,
    1140,
    1178,
    1179,
    1209,
    1278,
    1284,
    1285,
    1286,
    1287,
    1288,
    1338,
    1339,
    1340,
    1342,
    1375,
    1376
  ],
  "local_hose_unique_position_ids": [
    787,
    789,
    916,
    917,
    1140,
    1178,
    1179,
    1209,
    1278,
    1284,
    1285,
    1286,
    1287,
    1288,
    1338,
    1339,
    1340,
    1342,
    1375,
    1376
  ],
  "local_hose_cylinder_diagnostic": {
    "axis_point_at_x0_mm": [
      0,
      104.8911632117259,
      270.4818602745077
    ],
    "axis_direction_unnormalized": [
      1,
      0.11521607885950474,
      0.3894276012610559
    ],
    "radius_native_mm": 18.84642233046112,
    "rms_native_mm": 1.0263038135088975,
    "scope": "First visible run only, partial surface with circular section constraint; not a complete hose or dimensional calibration."
  },
  "selected_flange_center_xz_mm": [
    -30,
    239
  ],
  "held_gasket_pitch_mm": 70.5,
  "selected_bolt_axes_xz_mm": [
    [
      -58,
      239
    ],
    [
      -2,
      239
    ]
  ],
  "selected_flange_opening_estimate_mm": 40,
  "observed_bolt_feature_span_mm": 56.30564098701514,
  "selected_neck_start_mm": [
    -15.0,
    114.0,
    250.0
  ],
  "selected_neck_tip_mm": [
    21.0,
    114.0,
    280.0
  ],
  "selected_neck_axis": [
    0.7682212795973759,
    0.0,
    0.6401843996644799
  ],
  "held_neck_bead_hose_outside_inside_mm": [
    36,
    40,
    44,
    36.6
  ],
  "selected_hose_centerline_mm": [
    [
      7.940238246844611,
      114.0,
      269.11686520570385
    ],
    [
      135.0,
      108.0,
      320.0
    ],
    [
      180.0,
      70.0,
      365.0
    ]
  ],
  "selected_hose_bezier_control_points_mm": [
    [
      [
        7.940238246844611,
        114.0,
        269.11686520570385
      ],
      [
        38.669089430739646,
        114.0,
        294.72424119228305
      ],
      [
        100.0,
        115.0,
        310.0
      ],
      [
        135.0,
        108.0,
        320.0
      ]
    ],
    [
      [
        135.0,
        108.0,
        320.0
      ],
      [
        156.0,
        103.8,
        326.0
      ],
      [
        180.0,
        95.0,
        340.0
      ],
      [
        180.0,
        70.0,
        365.0
      ]
    ]
  ],
  "open_hose_end_center_mm": [
    180.0,
    70.0,
    365.0
  ],
  "unregistered_radiator_mouth_mm": [
    228.5,
    64,
    303
  ],
  "source_pump_thermostat_seat_center_mm": [
    0,
    96.5,
    191
  ],
  "selected_gasket_lower_center_mm": [
    -30,
    93.5,
    239
  ],
  "superseded_core_names": [
    "thermostat_housing_catalog_reference_provisional",
    "thermostat_housing_gasket_GTG103_photo_scaled_provisional",
    "thermostat_catalog_topology_provisional",
    "thermostat_housing_long_screw_CHA440_catalog_length_provisional",
    "thermostat_housing_short_screw_CHA441_catalog_length_provisional",
    "coolant_filler_plug_catalog_reference_provisional",
    "coolant_filler_seal_TRS1418_catalog_reference_provisional",
    "upper_radiator_hose_clamp_photo_reference_provisional"
  ],
  "limits": "Conditional photo construction in the existing provisional152mm stud-span frame, not a fitted survey. Plug-face centers and visible bolt features are interpreted image proxies. Shell points describe only the local hose surface; the fitted cylinder is a diagnostic on a partial arc, not an actual hose diameter or complete bend. Selected casting profiles, cap/base offset, neck angle/length, route, final plain bend and stations are estimates. The36/40mm neck/bead,44/36.6mm hose OD/ID and70.5mm gasket bolt pitch retain their earlier comparison bases; they are not promoted to owner measurements. The observed bolt-feature span is about56mm in the conditional frame, and guides a56mm construction bolt-axis span on the reconstructed casting; it does not verify the retained70.5mm gasket. Gasket, thermostat, cap, seal and bolt dimensions remain catalog/architecture comparisons; the40mm base opening, internal passages, seal loading and compatibility are unverified. The source water-pump seat and radiator port stay in their old independent poses; both interfaces remain open. The old complete upper-hose route remains separately selectable and hidden in the assembled view. No source obstacle is trimmed to erase contact. No pressure/flow behavior, loaded hose fit, working clearance, safe release order, applicable verified replacement procedure or removal path is established."
}