The plate and what bolts to it.
f₁ 239 → 156 Hzclears below hover at 148–160 MM
f₁ 147 → 287 Hzclears below hover at 5.0–5.5 MMbelow hover here — clear of the bench sweep, inside what the aircraft flies
f₁ ±4 Hz — too little to aim with
f₁ band widens 24 Hz — uncertainty, not the answer
no structural path
Drawn at the mount plane — where the motors bolt down, not where the blades sweep.
Every gram, every verdict — the same in all six lenses.
○ 5 not placed yet — counted against 249 g, not drawn.
PH3 — plate grams are wasm-rendered volume × nominal density until a slicer weighs it.