{
  "version": "0.1",
  "nodes": {
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    "2": { "id": 2, "name": "plate_centered_xy", "op": { "type": "Translate", "child": 1, "offset": { "x": -40, "y": -40, "z": 0 } } },
    "3": { "id": 3, "name": "center_hole_cyl", "op": { "type": "Cylinder", "radius": 6, "height": 6, "segments": 32 } },
    "4": { "id": 4, "name": "plate_minus_center", "op": { "type": "Difference", "left": 2, "right": 3 } },
    "5": { "id": 5, "name": "corner_hole_cyl", "op": { "type": "Cylinder", "radius": 3, "height": 6, "segments": 32 } },
    "6": { "id": 6, "name": "corner1_at_-30_-30", "op": { "type": "Translate", "child": 5, "offset": { "x": -30, "y": -30, "z": 0 } } },
    "7": { "id": 7, "name": "minus_corner1", "op": { "type": "Difference", "left": 4, "right": 6 } },
    "8": { "id": 8, "name": "corner2_at_30_-30", "op": { "type": "Translate", "child": 5, "offset": { "x": 30, "y": -30, "z": 0 } } },
    "9": { "id": 9, "name": "minus_corner2", "op": { "type": "Difference", "left": 7, "right": 8 } },
    "10": { "id": 10, "name": "corner3_at_30_30", "op": { "type": "Translate", "child": 5, "offset": { "x": 30, "y": 30, "z": 0 } } },
    "11": { "id": 11, "name": "minus_corner3", "op": { "type": "Difference", "left": 9, "right": 10 } },
    "12": { "id": 12, "name": "corner4_at_-30_30", "op": { "type": "Translate", "child": 5, "offset": { "x": -30, "y": 30, "z": 0 } } },
    "13": { "id": 13, "name": "final_plate", "op": { "type": "Difference", "left": 11, "right": 12 } }
  },
  "materials": {},
  "part_materials": {},
  "roots": [{ "root": 13, "material": "default" }]
}