[
  {
    "type": "pcb_board",
    "pcb_board_id": "pcb_board_1",
    "width": 40,
    "height": 30,
    "thickness": 1.6,
    "center": { "x": 0, "y": 0 }
  },
  {
    "type": "pcb_cutout",
    "pcb_cutout_id": "pcb_cutout_1",
    "shape": "circle",
    "center": { "x": -12, "y": 0 },
    "radius": 4
  },
  {
    "type": "pcb_cutout",
    "pcb_cutout_id": "pcb_cutout_2",
    "shape": "rect",
    "center": { "x": 0, "y": 0 },
    "width": 8,
    "height": 5,
    "rotation": 30
  },
  {
    "type": "pcb_cutout",
    "pcb_cutout_id": "pcb_cutout_3",
    "shape": "polygon",
    "points": [
      { "x": 8, "y": -5 },
      { "x": 16, "y": -5 },
      { "x": 16, "y": 2 },
      { "x": 12, "y": 6 },
      { "x": 8, "y": 2 }
    ]
  }
]