{
  "hard_shell_mm": [
    420,
    460,
    130
  ],
  "pad_max_mm": 145,
  "tip_retracted_mm": 135,
  "tip_max_mm": 155,
  "z_usable_stroke_mm": 20,
  "tip_crown_diameters_mm": [
    20,
    16
  ],
  "status": "design study; retaining pin and clearance require engineering review"
}