{
  "version": "0.1",
  "nodes": {
    "1": {"id": 1, "name": "block", "op": {"type": "Cube", "size": {"x": 60, "y": 60, "z": 10}}},
    "2": {"id": 2, "name": "block_centered", "op": {"type": "Translate", "child": 1, "offset": {"x": -30, "y": -30, "z": 0}}},

    "10": {"id": 10, "name": "hole_cyl_0", "op": {"type": "Cylinder", "radius": 2.5, "height": 10, "segments": 32}},
    "11": {"id": 11, "name": "hole_0", "op": {"type": "Translate", "child": 10, "offset": {"x": 20, "y": 0, "z": 0}}},

    "20": {"id": 20, "name": "hole_cyl_1", "op": {"type": "Cylinder", "radius": 2.5, "height": 10, "segments": 32}},
    "21": {"id": 21, "name": "hole_1", "op": {"type": "Translate", "child": 20, "offset": {"x": 14.142135623730951, "y": 14.142135623730951, "z": 0}}},

    "30": {"id": 30, "name": "hole_cyl_2", "op": {"type": "Cylinder", "radius": 2.5, "height": 10, "segments": 32}},
    "31": {"id": 31, "name": "hole_2", "op": {"type": "Translate", "child": 30, "offset": {"x": 0, "y": 20, "z": 0}}},

    "40": {"id": 40, "name": "hole_cyl_3", "op": {"type": "Cylinder", "radius": 2.5, "height": 10, "segments": 32}},
    "41": {"id": 41, "name": "hole_3", "op": {"type": "Translate", "child": 40, "offset": {"x": -14.142135623730951, "y": 14.142135623730951, "z": 0}}},

    "50": {"id": 50, "name": "hole_cyl_4", "op": {"type": "Cylinder", "radius": 2.5, "height": 10, "segments": 32}},
    "51": {"id": 51, "name": "hole_4", "op": {"type": "Translate", "child": 50, "offset": {"x": -20, "y": 0, "z": 0}}},

    "60": {"id": 60, "name": "hole_cyl_5", "op": {"type": "Cylinder", "radius": 2.5, "height": 10, "segments": 32}},
    "61": {"id": 61, "name": "hole_5", "op": {"type": "Translate", "child": 60, "offset": {"x": -14.142135623730951, "y": -14.142135623730951, "z": 0}}},

    "70": {"id": 70, "name": "hole_cyl_6", "op": {"type": "Cylinder", "radius": 2.5, "height": 10, "segments": 32}},
    "71": {"id": 71, "name": "hole_6", "op": {"type": "Translate", "child": 70, "offset": {"x": 0, "y": -20, "z": 0}}},

    "80": {"id": 80, "name": "hole_cyl_7", "op": {"type": "Cylinder", "radius": 2.5, "height": 10, "segments": 32}},
    "81": {"id": 81, "name": "hole_7", "op": {"type": "Translate", "child": 80, "offset": {"x": 14.142135623730951, "y": -14.142135623730951, "z": 0}}},

    "100": {"id": 100, "name": "diff_01", "op": {"type": "Difference", "left": 2, "right": 11}},
    "101": {"id": 101, "name": "diff_02", "op": {"type": "Difference", "left": 100, "right": 21}},
    "102": {"id": 102, "name": "diff_03", "op": {"type": "Difference", "left": 101, "right": 31}},
    "103": {"id": 103, "name": "diff_04", "op": {"type": "Difference", "left": 102, "right": 41}},
    "104": {"id": 104, "name": "diff_05", "op": {"type": "Difference", "left": 103, "right": 51}},
    "105": {"id": 105, "name": "diff_06", "op": {"type": "Difference", "left": 104, "right": 61}},
    "106": {"id": 106, "name": "diff_07", "op": {"type": "Difference", "left": 105, "right": 71}},
    "107": {"id": 107, "name": "diff_08", "op": {"type": "Difference", "left": 106, "right": 81}}
  },
  "materials": {},
  "part_materials": {},
  "roots": [{"root": 107, "material": "default"}]
}