{
  "version": "0.1",
  "nodes": {
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    "2": {"id": 2, "name": "bore_raw", "op": {"type": "Cylinder", "radius": 10.0, "height": 42.0, "segments": 64}},
    "3": {"id": 3, "name": "bore", "op": {"type": "Translate", "child": 2, "offset": {"x": 0.0, "y": 0.0, "z": -1.0}}},
    "4": {"id": 4, "name": "pipe", "op": {"type": "Difference", "left": 1, "right": 3}}
  },
  "materials": {},
  "part_materials": {},
  "roots": [{"root": 4, "material": "default"}]
}