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          "image_id": 3,
          "source_xy": [
            778.2532552083333,
            555.4297688802083
          ]
        },
        {
          "image_id": 20,
          "source_xy": [
            1119.2527669270833,
            530.1844075520833
          ]
        }
      ]
    },
    "1366": {
      "engine_mm": [
        87.41233692108047,
        108.27772073821298,
        382.12442132566537
      ],
      "source_observations": [
        {
          "image_id": 4,
          "source_xy": [
            1519.44580078125,
            2226.636962890625
          ]
        },
        {
          "image_id": 3,
          "source_xy": [
            621.65478515625,
            556.4358723958333
          ]
        },
        {
          "image_id": 20,
          "source_xy": [
            750.8562825520833,
            540.3972981770833
          ]
        }
      ]
    },
    "1367": {
      "engine_mm": [
        166.9063928415002,
        101.34889047838551,
        380.2239232803511
      ],
      "source_observations": [
        {
          "image_id": 4,
          "source_xy": [
            1868.2049560546875,
            2173.8997395833335
          ]
        },
        {
          "image_id": 3,
          "source_xy": [
            777.9521484375,
            561.067138671875
          ]
        },
        {
          "image_id": 20,
          "source_xy": [
            1118.70263671875,
            542.62060546875
          ]
        }
      ]
    },
    "1396": {
      "engine_mm": [
        -158.17716661549753,
        88.48703013377713,
        389.1354898708078
      ],
      "source_observations": [
        {
          "image_id": 2,
          "source_xy": [
            1794.2832438151042,
            2043.0173746744792
          ]
        },
        {
          "image_id": 3,
          "source_xy": [
            68.92319742838541,
            562.38427734375
          ]
        },
        {
          "image_id": 19,
          "source_xy": [
            1045.8517456054688,
            1294.6968587239585
          ]
        }
      ]
    },
    "1397": {
      "engine_mm": [
        -177.16037826796725,
        87.80045323707328,
        371.6847523247175
      ],
      "source_observations": [
        {
          "image_id": 2,
          "source_xy": [
            1705.803426106771,
            1951.39892578125
          ]
        },
        {
          "image_id": 3,
          "source_xy": [
            31.70765431722005,
            521.7598470052083
          ]
        },
        {
          "image_id": 19,
          "source_xy": [
            794.6897379557292,
            1048.4552001953125
          ]
        }
      ]
    },
    "1402": {
      "engine_mm": [
        -171.00782460337484,
        88.3431519623009,
        371.37144036506396
      ],
      "source_observations": [
        {
          "image_id": 2,
          "source_xy": [
            1735.446980794271,
            1951.1617024739585
          ]
        },
        {
          "image_id": 3,
          "source_xy": [
            46.26225280761719,
            522.1780598958333
          ]
        },
        {
          "image_id": 19,
          "source_xy": [
            881.6836547851562,
            1047.574462890625
          ]
        }
      ]
    },
    "1407": {
      "engine_mm": [
        -183.8936332599923,
        88.1816209177685,
        372.9733656993208
      ],
      "source_observations": [
        {
          "image_id": 2,
          "source_xy": [
            1672.327372233073,
            1954.9979654947917
          ]
        },
        {
          "image_id": 3,
          "source_xy": [
            13.73785654703776,
            523.9081217447916
          ]
        },
        {
          "image_id": 19,
          "source_xy": [
            695.8562723795574,
            1058.5181681315105
          ]
        }
      ]
    }
  },
  "roof_fit": {
    "formula": "Y=c0+c1*(X/100)+c2*(X/100)^2+c3*((Z-375)/20)",
    "coefficients": [
      105.23431530160154,
      6.446187214818616,
      -2.162841565326897,
      -3.2761426037459125
    ],
    "rms_native_mm": 1.9841601521509828,
    "scope": "Visible main roof only; right folded end and forward return are separate construction."
  },
  "upper_head_source_pixels": {
    "left": {
      "img_6853.jpg": [
        84,
        526
      ],
      "img_6854.jpg": [
        1825,
        1960
      ]
    },
    "right": {
      "img_6853.jpg": [
        673,
        538
      ],
      "img_6855.jpg": [
        1630,
        2167
      ]
    }
  },
  "upper_head_features": {
    "left": {
      "conditional_head_feature_native_mm": [
        -152.50845182582813,
        94.48744505146084,
        373.5809875343474
      ],
      "residual_analysis_pixels": {
        "img_6853.jpg": 0.4269634227571394,
        "img_6854.jpg": 0.4841680034899381
      }
    },
    "right": {
      "conditional_head_feature_native_mm": [
        112.48477373131668,
        109.95751015043601,
        373.2070016097244
      ],
      "residual_analysis_pixels": {
        "img_6853.jpg": 2.8119087081200465,
        "img_6855.jpg": 3.050733218353413
      }
    }
  },
  "selected_cover_hole_axes": {
    "left": {
      "point_mm": [
        -153.0,
        90.47246017284263,
        374.0
      ],
      "direction": [
        -0.1278682093871828,
        0.9787468452724276,
        0.1603257119035684
      ]
    },
    "right": {
      "point_mm": [
        112.0,
        110.06859078302692,
        373.0
      ],
      "direction": [
        -0.015801624307692917,
        0.9867245009489353,
        0.16163250878555643
      ]
    }
  },
  "selected_radiator_frame_translation_mm": [
    -60.0,
    -100.0,
    100.0
  ],
  "held_radiator_core_dimensions_mm": [
    422,
    258,
    40
  ],
  "selected_main_roof_x_bounds_mm": [
    -305,
    155
  ],
  "selected_right_tab_end_x_mm": 190,
  "selected_profile_z_stations_mm": [
    355,
    385,
    413
  ],
  "selected_front_return_drop_mm": 18,
  "retained_body_foot_centers_mm": {
    "left": [
      296.3333333333333,
      -226.69333333333333,
      333.9666666666667
    ],
    "right": [
      -296.3333333333333,
      -226.69333333333333,
      333.9666666666667
    ]
  },
  "selected_side_body_axes_mm": {
    "left": [
      [
        190.0,
        -180.0,
        430.0
      ],
      [
        190.0,
        10.0,
        430.0
      ]
    ],
    "right": [
      [
        -310.0,
        -180.0,
        430.0
      ],
      [
        -310.0,
        10.0,
        430.0
      ]
    ]
  },
  "frame_mapping": "Retain original upright frame, side and bottom roles at a new conditional pose. One observed outer cover replaces the unsupported stacked apron/raised-guard silhouette; hidden factory interface stays unresolved.",
  "factory_sources": [
    "https://www.spridgets.de/downloads/Parts-1977.pdf#page=88",
    "https://www.spridgets.de/downloads/Parts-1977.pdf#page=87"
  ],
  "factory_configuration_limit": "p88 cooling comparison and separate p87 early USA/Canada TSB75-A-6 branch retained; fitted branch not selected.",
  "limits": "Photo-estimated geometry and bounded placement in the provisional152mm engine-stud frame; no owner dimension or fitted registration. The main roof fit uses partial observed surface tracks. Left coverage is cropped; the460mm main width, clamped unseen crown, 35mm end tab,1.5mm projected profile gauge,355/385/413mm stations and18mm forward-return drop are construction estimates. The visible cover is modeled once; the factory distinct cowl/apron/guard interface behind it and fitted CHA281/CHA420 identities remain unresolved. The[-60,-100,+100]mm radiator/frame translation is a rounded construction hypothesis guided by the visible cover/right end and retained catalog envelope, not a triangulated hidden radiator survey or an optimization for zero collisions. Core/tank sizes, lower/upper hose shapes and body-foot centers stay. The top-hose low neck follows factory p86/p88 architecture with an estimated localY=-90mm station, not an upper-port interpretation. The translated radiator ports and hose endpoints remain unregistered; existing expansion and lower-hose route references do not automatically follow. New upper-channel/web profiles reconnect estimated side joints to old feet; no body receiver, weld, strength or loaded mount is verified. Two interpreted hex-head observations guide local cover holes, not fitted bolt axes or hardware identity.4.826x12.7mm screw dimensions are prior comparisons; 12mm AF/4mm head shapes, washer sections and hole radii are estimates, not tool/torque recommendations. Factory GRH525 top-hose naming does not imply an upper radiator-port height; p88 depicts its long return to a low tank neck. The retained old port stations are unselected comparisons, not a verified early/late USA/Canada configuration. No fitted fan sweep, hose/body clearance, complete coolant circuit, pressure behavior, safe support/release sequence or verified replacement/removal path.",
  "top_hose_low_port_comparison": {
    "former_local_y_mm": 64,
    "selected_local_y_mm": -90,
    "selected_native_center_mm": [
      168.5,
      -190,
      433
    ],
    "basis": "Factory p86/p88 depict GRH525 returning to a low tank neck. Local station/angles remain unmeasured construction, not a selected fitted radiator variant."
  },
  "landing_panel_reconstruction": {
    "front_clip_reconstruction": {
      "factory_source": "https://www.spridgets.de/downloads/Midget%201500%20WH%20Teil%201.pdf#page=14",
      "factory_publication": "AKM4071/B general specification p14",
      "factory_imperial_overall_length": "11ft9in",
      "imperial_conversion_mm": 3581.4,
      "printed_metric_overall_length_m": 3.36,
      "metric_conflict": "The adjacent factory metric entry conflicts with the imperial entry. Imperial conversion is the selected nominal comparison, not a fitted survey.",
      "supplier_crosscheck": "https://mossmotors.com/1500-midget-gan6",
      "owner_photos": [
        "IMG_6329",
        "IMG_6853",
        "IMG_6854",
        "IMG_6856"
      ],
      "owner_dimensions_applied": false,
      "estimated_fixed_rear_bumper_extreme_mm": -1930.4,
      "previous_front_bumper_extreme_mm": 1820.3333333333335,
      "previous_drawing_overall_length_mm": 3750.7333333333336,
      "estimated_front_module_shift_mm": -169.33333333333337,
      "estimated_front_bumper_extreme_mm": 1651.0,
      "estimated_drawing_overall_length_mm": 3581.4,
      "held_aft_panel_boundary_units": 0.835,
      "old_nose_face_units": 2.025,
      "new_nose_face_units": 1.825,
      "panel_map": "Z unchanged through.835; Znew=Zold-(.2/(2.025-.835)^2)*(Zold-.835)^2 up to the old nose face; rigid-.2 beyond. Inverse maps the retained longitudinal height/width profile.",
      "basis": "The original bumper envelopes exceed the selected nominal length by169.333mm. Owner IMG_6329 wheel-derived comparison independently flags excess forward body/marker projection. This reconstruction allocates that whole drawing difference to the front, retaining the rear body, axles, engine/cowl and rear bonnet hinges/stay. This allocation is estimated, not determined by the overall-length specification.",
      "limits": "No measured front/rear overhangs, actual bumper extremities, factory body-alignment station map or common body/engine survey. The printed metric conflict remains. Panel longitudinal contours shorten; wheel-opening Y/Z cuts and axle stations stay. Front detailed lamp and bumper dimensions remain rigid while their drawing positions change; front bumper beams shorten from held rear feet. Landing-panel/catch/bonnet relationships follow the revised reference. No fitted seams, weld ownership, operating clearance, collision safety, support strength, locking, bonnet sweep or verified replacement/removal path is established. Do not use this as a fabrication or drilling template."
    },
    "classification": "uncalibrated_owner_photo_reconstruction_hypothesis",
    "owner_photos": [
      "IMG_6853",
      "IMG_6854"
    ],
    "owner_dimensions_applied": false,
    "estimated_flat_platform_bounds_body_mm": {
      "x": [
        -499.53333333333336,
        499.53333333333336
      ],
      "top_y": 711.2,
      "z": [
        1271.3649742249843,
        1536.7000000000003
      ]
    },
    "estimated_rear_edge_body_mm": [
      [
        -311.0,
        639.2,
        1133.9
      ],
      [
        191.0,
        639.2,
        1133.9
      ]
    ],
    "estimated_rear_edge_to_platform_back_span_mm": 137.4649742249842,
    "estimated_projected_y_gauge_mm": 1.5,
    "basis": "Owner front-bay photographs support adjacency of painted platform and cowl. A tapered rear tongue is one construction hypothesis connecting the retained front platform to the declared cowl front/top reference. Its rear X/Y/Z edge follows that reference; perspective does not establish fitted dimensions.",
    "limits": "Every outline, slope, gauge, opening and joint remains estimated. This fills an omission in the drawing, not a measured gap on the car. The supplied cowl-edge reference controls the rear tongue. Front platform, latch and safety/access opening stations remain in their declared front-module frame; no fitted common registration is inferred. No upper screw counterpart, hidden flange, seam, weld, sealed air duct, load path, fitted clearance or verified withdrawal path is established. The new panel is fixed body structure in the display; isolation is not panel removal.",
    "cooling_photo_reference": "cooling-photo-registration.json"
  }
}