{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "base_rail",
      "op": {
        "type": "Cube",
        "size": {"x": 100, "y": 20, "z": 8}
      }
    },
    "2": {
      "id": 2,
      "name": "base_rail_centered",
      "op": {
        "type": "Translate",
        "child": 1,
        "offset": {"x": -50, "y": -10, "z": 0}
      }
    },
    "3": {
      "id": 3,
      "name": "hole_1",
      "op": {
        "type": "Cylinder",
        "radius": 3,
        "height": 10,
        "segments": 32
      }
    },
    "4": {
      "id": 4,
      "name": "hole_1_positioned",
      "op": {
        "type": "Translate",
        "child": 3,
        "offset": {"x": -40, "y": 0, "z": -1}
      }
    },
    "5": {
      "id": 5,
      "name": "hole_2",
      "op": {
        "type": "Cylinder",
        "radius": 3,
        "height": 10,
        "segments": 32
      }
    },
    "6": {
      "id": 6,
      "name": "hole_2_positioned",
      "op": {
        "type": "Translate",
        "child": 5,
        "offset": {"x": 0, "y": 0, "z": -1}
      }
    },
    "7": {
      "id": 7,
      "name": "hole_3",
      "op": {
        "type": "Cylinder",
        "radius": 3,
        "height": 10,
        "segments": 32
      }
    },
    "8": {
      "id": 8,
      "name": "hole_3_positioned",
      "op": {
        "type": "Translate",
        "child": 7,
        "offset": {"x": 40, "y": 0, "z": -1}
      }
    },
    "9": {
      "id": 9,
      "name": "rail_minus_hole1",
      "op": {
        "type": "Difference",
        "left": 2,
        "right": 4
      }
    },
    "10": {
      "id": 10,
      "name": "rail_minus_hole12",
      "op": {
        "type": "Difference",
        "left": 9,
        "right": 6
      }
    },
    "11": {
      "id": 11,
      "name": "mounting_rail",
      "op": {
        "type": "Difference",
        "left": 10,
        "right": 8
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    {
      "root": 11,
      "material": "default"
    }
  ]
}