{
  "manufacturer": "https://www.bmh-ltd.com/vehicle-parts/mg-midget-parts/mg-midget-front-centre-body/",
  "manufacturer_read": "F4/F7/F8 drawing visually read; BMH8022/23 inner panels, CZJ682/683 complete wheelhouses, BMH8024/25 triangular supports for rubber-bumper cars. Earlier AHA5436/AHA5403 alternatives remain unselected.",
  "supplier": "https://www.mgocspares.co.uk/product/czj683/w-arch-front-1500-l-h",
  "supplier_read": "Four supplier views102263/102316/102364/102387 visually rechecked. Large rounded triangular support opening/folded edges and stepped/rounded lower valance mouth. No scaled tracing, dimensions, side-to-side equivalence or fitted identity recovered.",
  "firsthand_assembly": "https://www.britishv8.org/Articles/BritishMotorHeritage-Midget.htm",
  "firsthand_scope": "BB/BC visually rechecked for rail/valance support relationship. The longitudinal web plane and its installed station are an estimated interpretation, not a surveyed coordinate frame.",
  "owner_evidence": "Existing IMG6853 and IMG6856 visually rechecked for bay/inner-wing context. Hidden support sections and common engine/body registration remain unresolved. No new dimensions or repeat captures applied.",
  "failed_additional_source": "Garagemessmer BMH8025 product request returnedHTTP403; isolated product photo not read or used.",
  "nodes": {
    "nodes": {
      "left": {
        "source": "https://www.mgocspares.co.uk/product/czj683/w-arch-front-1500-l-h",
        "limits": "Supplier CZJ683 views show a broad triangular support with an open rounded triangular window and folded edges, and a stepped/rounded lower inner-valance mouth. BMH lists BMH8024/25 rubber-bumper supports separately from earlier AHA5436/AHA5403. Firsthand BMH assembly views BB/BC support a longitudinal rail/valance support interpretation, but no fitted part or pose is identified. Longitudinal web plane, spanZ=.35 to .90, rail-edgeX=.3975, rear top at existing roof,1.5mm projected sections,12mm bottom return, upper return toX=.48, triangular aperture vertices/radii, mouth steps/radii and mirrored opposite side are construction estimates. The previous narrow transverse triangle and rectangular mouth are superseded, not measured reference datums. Roof/upper closure, wheel opening, pump receiver and all suspension/steering datums stay. No factory dimensioned profile, hidden seams/laps, welds, strength, support point, loaded clearance, tool access or verified removal/repair path follows.",
        "estimated_web_plane_x_units": 0.3975,
        "estimated_span_z_units": [
          0.35,
          0.9
        ],
        "estimated_base_y_units": 0.385,
        "estimated_rear_top_y_units": 0.58,
        "estimated_bottom_return_width_mm": 12,
        "estimated_projected_gauge_mm": 1.5,
        "estimated_window_vertices_yz_mm": [
          [
            362.2886666666667,
            352.2133333333333
          ],
          [
            438.23466666666667,
            352.2133333333333
          ],
          [
            362.2886666666667,
            566.4200000000001
          ]
        ],
        "estimated_window_corner_radius_mm": 8,
        "estimated_window_witness_mm": [
          336.55000000000007,
          387.6039999999999,
          423.6155555555556
        ],
        "owner_dimensions_applied": false
      },
      "right": {
        "source": "https://www.mgocspares.co.uk/product/czj683/w-arch-front-1500-l-h",
        "limits": "Supplier CZJ683 views show a broad triangular support with an open rounded triangular window and folded edges, and a stepped/rounded lower inner-valance mouth. BMH lists BMH8024/25 rubber-bumper supports separately from earlier AHA5436/AHA5403. Firsthand BMH assembly views BB/BC support a longitudinal rail/valance support interpretation, but no fitted part or pose is identified. Longitudinal web plane, spanZ=.35 to .90, rail-edgeX=.3975, rear top at existing roof,1.5mm projected sections,12mm bottom return, upper return toX=.48, triangular aperture vertices/radii, mouth steps/radii and mirrored opposite side are construction estimates. The previous narrow transverse triangle and rectangular mouth are superseded, not measured reference datums. Roof/upper closure, wheel opening, pump receiver and all suspension/steering datums stay. No factory dimensioned profile, hidden seams/laps, welds, strength, support point, loaded clearance, tool access or verified removal/repair path follows.",
        "estimated_web_plane_x_units": -0.3975,
        "estimated_span_z_units": [
          0.35,
          0.9
        ],
        "estimated_base_y_units": 0.385,
        "estimated_rear_top_y_units": 0.58,
        "estimated_bottom_return_width_mm": 12,
        "estimated_projected_gauge_mm": 1.5,
        "estimated_window_vertices_yz_mm": [
          [
            362.2886666666667,
            352.2133333333333
          ],
          [
            438.23466666666667,
            352.2133333333333
          ],
          [
            362.2886666666667,
            566.4200000000001
          ]
        ],
        "estimated_window_corner_radius_mm": 8,
        "estimated_window_witness_mm": [
          -336.55000000000007,
          387.6039999999999,
          423.6155555555556
        ],
        "owner_dimensions_applied": false
      }
    },
    "mouth": {
      "estimated_boundary_commands_zy_units": [
        [
          "line",
          [
            1.55,
            0.35
          ]
        ],
        [
          "line",
          [
            1.55,
            0.59
          ]
        ],
        [
          "arc",
          [
            1.529497,
            0.639497
          ],
          [
            1.48,
            0.66
          ]
        ],
        [
          "line",
          [
            1.12,
            0.66
          ]
        ],
        [
          "arc",
          [
            1.105858,
            0.665858
          ],
          [
            1.1,
            0.68
          ]
        ],
        [
          "line",
          [
            1.1,
            0.7
          ]
        ],
        [
          "arc",
          [
            1.088284,
            0.728284
          ],
          [
            1.06,
            0.74
          ]
        ],
        [
          "line",
          [
            0.96,
            0.74
          ]
        ],
        [
          "arc",
          [
            0.917574,
            0.722426
          ],
          [
            0.9,
            0.68
          ]
        ],
        [
          "line",
          [
            0.9,
            0.35
          ]
        ]
      ],
      "retained_outer_bounds_zy_units": [
        0.9,
        1.55,
        0.35,
        0.74
      ],
      "estimated_main_roof_y_units": 0.66,
      "estimated_rear_step_peak_y_units": 0.74,
      "profile_basis": "Supplier-view topology; no scale tracing or fitted aperture survey.",
      "limits": "Supplier CZJ683 views show a broad triangular support with an open rounded triangular window and folded edges, and a stepped/rounded lower inner-valance mouth. BMH lists BMH8024/25 rubber-bumper supports separately from earlier AHA5436/AHA5403. Firsthand BMH assembly views BB/BC support a longitudinal rail/valance support interpretation, but no fitted part or pose is identified. Longitudinal web plane, spanZ=.35 to .90, rail-edgeX=.3975, rear top at existing roof,1.5mm projected sections,12mm bottom return, upper return toX=.48, triangular aperture vertices/radii, mouth steps/radii and mirrored opposite side are construction estimates. The previous narrow transverse triangle and rectangular mouth are superseded, not measured reference datums. Roof/upper closure, wheel opening, pump receiver and all suspension/steering datums stay. No factory dimensioned profile, hidden seams/laps, welds, strength, support point, loaded clearance, tool access or verified removal/repair path follows."
    },
    "superseded_fields": [
      "nodes.*.estimated_support_z_units",
      "nodes.*.support_rail_corner_units",
      "nodes.*.support_valance_top_units"
    ],
    "historical_fields_note": "Old transverse support fields moved here as historical estimates only; new support nodes above govern this revision.",
    "historical_transverse_support_nodes": {
      "left": {
        "estimated_support_z_units": 0.72,
        "support_rail_corner_units": [
          0.3975,
          0.385,
          0.72
        ],
        "support_valance_top_units": [
          0.48,
          0.8046030544517172,
          0.72
        ]
      },
      "right": {
        "estimated_support_z_units": 0.72,
        "support_rail_corner_units": [
          -0.3975,
          0.385,
          0.72
        ],
        "support_valance_top_units": [
          -0.48,
          0.8046030544517172,
          0.72
        ]
      }
    }
  },
  "limits": "Supplier CZJ683 views show a broad triangular support with an open rounded triangular window and folded edges, and a stepped/rounded lower inner-valance mouth. BMH lists BMH8024/25 rubber-bumper supports separately from earlier AHA5436/AHA5403. Firsthand BMH assembly views BB/BC support a longitudinal rail/valance support interpretation, but no fitted part or pose is identified. Longitudinal web plane, spanZ=.35 to .90, rail-edgeX=.3975, rear top at existing roof,1.5mm projected sections,12mm bottom return, upper return toX=.48, triangular aperture vertices/radii, mouth steps/radii and mirrored opposite side are construction estimates. The previous narrow transverse triangle and rectangular mouth are superseded, not measured reference datums. Roof/upper closure, wheel opening, pump receiver and all suspension/steering datums stay. No factory dimensioned profile, hidden seams/laps, welds, strength, support point, loaded clearance, tool access or verified removal/repair path follows.",
  "workshop": "No applicable factory cutting/welding/repair or verified component withdrawal sequence is available from these product drawings. Body panels stay fixed in display separation; openings are not measured tool/suspension clearances.",
  "additional_supplier_checks": "MGOC guessedBMH8025 page showed NoImage; AngloParts136.409 showed no_image_available; RimmerBMH8025 showed default.gif. No isolated support photograph recovered or used."
}