{
 "object": "rocker-pivot-base",
 "license": "CC BY 4.0, Xem Studio",
 "files": [
  {
   "name": "marble-engine-base",
   "step": "/files/hardware/rocker-pivot-base/marble-engine-base.step",
   "stl": "/files/hardware/rocker-pivot-base/marble-engine-base.stl",
   "note": "base 438 × 100 × 8 (y −60..40): 4 × Ø3.4 for the two pivot posts and 4 for the two crank stands, each with an M3 nut pocket (5.5 AF) from the underside"
  }
 ]
}