{
  "version": "0.1",
  "nodes": {
    "1": {"id": 1, "name": "cube_raw", "op": {"type": "Cube", "size": {"x": 30, "y": 30, "z": 30}}},
    "2": {"id": 2, "name": "cube", "op": {"type": "Translate", "child": 1, "offset": {"x": -15, "y": -15, "z": 0}}},
    "10": {"id": 10, "name": "hole_proto", "op": {"type": "Cylinder", "radius": 1.5, "height": 32, "segments": 32}},
    "11": {"id": 11, "name": "hole_base", "op": {"type": "Translate", "child": 10, "offset": {"x": 0, "y": 0, "z": -1}}},

    "20": {"id": 20, "name": "h_mm", "op": {"type": "Translate", "child": 11, "offset": {"x": -8, "y": -8, "z": 0}}},
    "21": {"id": 21, "name": "h_0m", "op": {"type": "Translate", "child": 11, "offset": {"x": 0, "y": -8, "z": 0}}},
    "22": {"id": 22, "name": "h_pm", "op": {"type": "Translate", "child": 11, "offset": {"x": 8, "y": -8, "z": 0}}},
    "23": {"id": 23, "name": "h_m0", "op": {"type": "Translate", "child": 11, "offset": {"x": -8, "y": 0, "z": 0}}},
    "24": {"id": 24, "name": "h_00", "op": {"type": "Translate", "child": 11, "offset": {"x": 0, "y": 0, "z": 0}}},
    "25": {"id": 25, "name": "h_p0", "op": {"type": "Translate", "child": 11, "offset": {"x": 8, "y": 0, "z": 0}}},
    "26": {"id": 26, "name": "h_mp", "op": {"type": "Translate", "child": 11, "offset": {"x": -8, "y": 8, "z": 0}}},
    "27": {"id": 27, "name": "h_0p", "op": {"type": "Translate", "child": 11, "offset": {"x": 0, "y": 8, "z": 0}}},
    "28": {"id": 28, "name": "h_pp", "op": {"type": "Translate", "child": 11, "offset": {"x": 8, "y": 8, "z": 0}}},

    "30": {"id": 30, "name": "u1", "op": {"type": "Union", "left": 20, "right": 21}},
    "31": {"id": 31, "name": "u2", "op": {"type": "Union", "left": 30, "right": 22}},
    "32": {"id": 32, "name": "u3", "op": {"type": "Union", "left": 31, "right": 23}},
    "33": {"id": 33, "name": "u4", "op": {"type": "Union", "left": 32, "right": 24}},
    "34": {"id": 34, "name": "u5", "op": {"type": "Union", "left": 33, "right": 25}},
    "35": {"id": 35, "name": "u6", "op": {"type": "Union", "left": 34, "right": 26}},
    "36": {"id": 36, "name": "u7", "op": {"type": "Union", "left": 35, "right": 27}},
    "37": {"id": 37, "name": "holes_all", "op": {"type": "Union", "left": 36, "right": 28}},

    "40": {"id": 40, "name": "result", "op": {"type": "Difference", "left": 2, "right": 37}}
  },
  "materials": {},
  "part_materials": {},
  "roots": [{"root": 40, "material": "default"}]
}