[
  {
    "id": "SD01",
    "cases": [
      {
        "handle_diameter_mm": 6.3,
        "initial_lift_mm": 0,
        "first_obstructed_backward_rock_deg": 38.5,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 6.3,
        "initial_lift_mm": 0.5,
        "first_obstructed_backward_rock_deg": 41.5,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 9.0,
        "initial_lift_mm": 0,
        "first_obstructed_backward_rock_deg": 28.0,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 9.0,
        "initial_lift_mm": 0.5,
        "first_obstructed_backward_rock_deg": 30.5,
        "clear_through_60_deg": false
      }
    ],
    "scope": "Flat-ended cylindrical handles, pivot about rear heel. Collision limit only; no measured force, full escape search or rounded-shoulder claim."
  },
  {
    "id": "SD02",
    "cases": [
      {
        "handle_diameter_mm": 12.6,
        "initial_lift_mm": 0,
        "first_obstructed_backward_rock_deg": 47.0,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 12.6,
        "initial_lift_mm": 0.5,
        "first_obstructed_backward_rock_deg": 50.0,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 18.0,
        "initial_lift_mm": 0,
        "first_obstructed_backward_rock_deg": 27.5,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 18.0,
        "initial_lift_mm": 0.5,
        "first_obstructed_backward_rock_deg": 30.5,
        "clear_through_60_deg": false
      }
    ],
    "scope": "Flat-ended cylindrical handles, pivot about rear heel. Collision limit only; no measured force, full escape search or rounded-shoulder claim."
  },
  {
    "id": "SD03",
    "cases": [
      {
        "handle_diameter_mm": 21.0,
        "initial_lift_mm": 0,
        "first_obstructed_backward_rock_deg": 55.0,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 21.0,
        "initial_lift_mm": 0.5,
        "first_obstructed_backward_rock_deg": 58.0,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 30.0,
        "initial_lift_mm": 0,
        "first_obstructed_backward_rock_deg": 27.5,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 30.0,
        "initial_lift_mm": 0.5,
        "first_obstructed_backward_rock_deg": 30.0,
        "clear_through_60_deg": false
      }
    ],
    "scope": "Flat-ended cylindrical handles, pivot about rear heel. Collision limit only; no measured force, full escape search or rounded-shoulder claim."
  },
  {
    "id": "SD04",
    "cases": [
      {
        "handle_diameter_mm": 28.0,
        "initial_lift_mm": 0,
        "first_obstructed_backward_rock_deg": 60.0,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 28.0,
        "initial_lift_mm": 0.5,
        "first_obstructed_backward_rock_deg": null,
        "clear_through_60_deg": true
      },
      {
        "handle_diameter_mm": 40.0,
        "initial_lift_mm": 0,
        "first_obstructed_backward_rock_deg": 27.5,
        "clear_through_60_deg": false
      },
      {
        "handle_diameter_mm": 40.0,
        "initial_lift_mm": 0.5,
        "first_obstructed_backward_rock_deg": 30.0,
        "clear_through_60_deg": false
      }
    ],
    "scope": "Flat-ended cylindrical handles, pivot about rear heel. Collision limit only; no measured force, full escape search or rounded-shoulder claim."
  }
]