{
  "version": "v0.34",
  "date": "2026-10-15",
  "purpose": "systematic engineering review",
  "experiment_goal_confirmed": "steady wheel-load friction; acceleration/deceleration establishes/ends operating conditions",
  "baseline_CAD": "v0.31 old solid125x25",
  "candidate_wheel": "v0.33 K909200x50 pneumatic",
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