{
  "schema": "midget-carburetor-controls-evidence-v1",
  "units": "mm",
  "method": null,
  "basis": null,
  "configuration": null,
  "photo_refs": [],
  "carburetor_identity_observation": null,
  "linkage_identity_observation": null,
  "catalog_branch_comparison_note": null,
  "observed_items": [],
  "observed_connections": [],
  "observed_cables": [],
  "observed_springs": [],
  "item_fields_to_copy": {
    "owner_label": null,
    "observed_form_and_location": null,
    "role_observation_and_basis": null,
    "marking_observation": null,
    "photo_refs": [],
    "configuration": null,
    "named_geometry_observations": []
  },
  "connection_fields_to_copy": {
    "owner_label": null,
    "from_item_label": null,
    "from_attachment_note": null,
    "to_item_label": null,
    "to_attachment_note": null,
    "route_and_visibility_note": null,
    "role_confirmed_by_endpoint_trace": null,
    "as_found_retention_and_washer_stack_note": null,
    "first_visible_tool_obstruction_note": null,
    "photo_refs": []
  },
  "cable_fields_to_copy": {
    "item_label": null,
    "control_role_observation": null,
    "outer_cable_seats_and_clamps_note": null,
    "inner_wire_end_attachments_note": null,
    "adjuster_and_as_found_setting_note": null,
    "exposed_adjuster_length_mm": null,
    "exposed_length_reference_faces": null,
    "measurement_method_and_source_note": null,
    "configuration": null,
    "photo_refs": []
  },
  "spring_fields_to_copy": {
    "item_label": null,
    "hook_A_and_actual_anchor_note": null,
    "hook_B_and_actual_anchor_note": null,
    "installed_hook_datum_span_mm": null,
    "installed_span_reference_points": null,
    "removed_free_length_mm": null,
    "free_length_reference_points": null,
    "outside_diameter_mm": null,
    "wire_diameter_mm": null,
    "observed_coil_count": null,
    "marking_and_end_form_note": null,
    "measurement_method_and_source_note": null,
    "configuration": null,
    "photo_refs": []
  },
  "catalog_reference": "https://www.spridgets.de/downloads/Parts-1977.pdf#page=124",
  "limits": "Blank observation worksheet, not engine measurement-log input. Copy records only for actual observed items/connections; empty lists do not establish absence. Keep unreadable identity, hidden routes and untraced roles unknown. Factory Federal-to-1977 and California/later-Federal branches are comparisons, not a fitted selection by year or spring count. Separate photo observations from direct measurements and state the method for every reading. Do not equate a coiled cable covering or threaded adjuster with another return spring, or a separated visible spring section with a second spring. Keep outer-cable seats, inner-wire end attachments, link/pivot retention and each actual spring anchor distinct. Installed hook span is not removed free length; remove nothing merely to complete this record. No setting, preload, force, linkage travel, CAD pose, calibrated function, tool clearance or removal route is inferred. The internal air-valve spring is a different assembly."
}