{
  "factory_sources": [
    "https://www.spridgets.de/downloads/Parts-1977.pdf#page=146",
    "https://www.spridgets.de/downloads/Parts-1977.pdf#page=150"
  ],
  "factory_read": "Both plates visually read: axle case includes under-tube support topology; spring fixing plate separates locating plates/pads/clips. Early BTA694/695 and later DAM2483/2484 branches not identified as fitted.",
  "nodes": {
    "left": {
      "limits": "Factory Parts-1977 p146 shows axle-carried lower spring-seat structure; p150 supplies separate locating plates/pads/clips. Two new open channel seats are a topology comparison, not copied fitted brackets. Width60mm, fore/aft depth66mm,3mm gauge,15.2mm center opening and cheek/corner sections are estimates. Base follows the existing upper locating-web top; cheek cut follows the retainedR32 axle tube. The chosen reference bridges existing unregistered stations without moving axle, spring, plates or hardware; it does not prove fitted seat height or contact. The original bare plate/tube separation remains a source datum difference, not free operating clearance. Upper bump-stop bracket/retention and body strike surface remain unresolved. No weld, strength, clamp compression, alignment, torque, fabrication dimension or verified removal path.",
      "estimated_width_depth_gauge_mm": [
        60,
        66,
        3
      ],
      "estimated_center_opening_radius_mm": 15.2,
      "retained_axle_axis_xyz_mm": [
        406.40000000000003,
        330.20000000000005,
        -1016.0
      ],
      "retained_axle_radius_mm": 32,
      "estimated_base_y_bounds_mm": [
        257.8466666666667,
        260.8466666666667
      ],
      "estimated_cheek_center_x_offsets_mm": [
        -28.5,
        28.5
      ],
      "owner_dimensions_applied": false
    },
    "right": {
      "limits": "Factory Parts-1977 p146 shows axle-carried lower spring-seat structure; p150 supplies separate locating plates/pads/clips. Two new open channel seats are a topology comparison, not copied fitted brackets. Width60mm, fore/aft depth66mm,3mm gauge,15.2mm center opening and cheek/corner sections are estimates. Base follows the existing upper locating-web top; cheek cut follows the retainedR32 axle tube. The chosen reference bridges existing unregistered stations without moving axle, spring, plates or hardware; it does not prove fitted seat height or contact. The original bare plate/tube separation remains a source datum difference, not free operating clearance. Upper bump-stop bracket/retention and body strike surface remain unresolved. No weld, strength, clamp compression, alignment, torque, fabrication dimension or verified removal path.",
      "estimated_width_depth_gauge_mm": [
        60,
        66,
        3
      ],
      "estimated_center_opening_radius_mm": 15.2,
      "retained_axle_axis_xyz_mm": [
        -406.40000000000003,
        330.20000000000005,
        -1016.0
      ],
      "retained_axle_radius_mm": 32,
      "estimated_base_y_bounds_mm": [
        257.8466666666667,
        260.8466666666667
      ],
      "estimated_cheek_center_x_offsets_mm": [
        -28.5,
        28.5
      ],
      "owner_dimensions_applied": false
    }
  },
  "limits": "Factory Parts-1977 p146 shows axle-carried lower spring-seat structure; p150 supplies separate locating plates/pads/clips. Two new open channel seats are a topology comparison, not copied fitted brackets. Width60mm, fore/aft depth66mm,3mm gauge,15.2mm center opening and cheek/corner sections are estimates. Base follows the existing upper locating-web top; cheek cut follows the retainedR32 axle tube. The chosen reference bridges existing unregistered stations without moving axle, spring, plates or hardware; it does not prove fitted seat height or contact. The original bare plate/tube separation remains a source datum difference, not free operating clearance. Upper bump-stop bracket/retention and body strike surface remain unresolved. No weld, strength, clamp compression, alignment, torque, fabrication dimension or verified removal path.",
  "bump_stop_review": {
    "factory": "p150 lists AHH7074 prior to AHH9158; AHH9158 two per car. No fitted identity selected.",
    "supplier_photo": "https://www.mgocspares.co.uk/ImageHandler/108534w1000h1000/AHH9158?sequence=108534&width=1000&height=1000",
    "supplier_dimensions": "https://philipsclassics.be/nl/products/bump-stop-rear-axle-rubber",
    "supplier_nominal_comparison_mm": {
      "outside_diameter": 55,
      "overall_height": 55,
      "inside_diameters_recorded_not_applied": [
        14,
        18.7
      ]
    },
    "precise_gap": "Rubber lower retention section, its installed axis/attachment and the actual body strike surface remain unidentified. A trial centered over the current spring axis would cross the existing estimated wheelhouse web, so no bump-stop body or strike plate is placed.",
    "action": "No pose chosen to hide this source conflict; continue known under-tube seat topology independently.",
    "conditional_envelope_check": {
      "left": {
        "conditional_envelope_base_xyz_mm": [
          406.40000000000003,
          400.20000000000005,
          -1016.0
        ],
        "envelope_diameter_height_mm": [
          55,
          55
        ],
        "nominal_envelope_to_wheelhouse_overlap_mm3": 4354.560729951929
      },
      "right": {
        "conditional_envelope_base_xyz_mm": [
          -406.40000000000003,
          400.20000000000005,
          -1016.0
        ],
        "envelope_diameter_height_mm": [
          55,
          55
        ],
        "nominal_envelope_to_wheelhouse_overlap_mm3": 4354.560729950486
      }
    },
    "envelope_check_limit": "70mm lift above the retained tube axis is an unmeasured trial, not a located stop or a factory bracket height. Cylindrical nominal maximum envelope only, not measured rubber shape or proof of actual-car interference. No stop/strike geometry applied."
  },
  "unread_source": "eBay128150317024 casing-photo request returnedHTTP403. No seller photo inspected or later-case fit inferred.",
  "owner_dimensions_applied": false,
  "workshop": "No welding, spring release, clamp torque, support order, suspension travel or verified withdrawal path established."
}