diff --git a/docs/qa-modes-bench.md b/docs/qa-modes-bench.md
index a3b5233..fd5d0ad 100644
--- a/docs/qa-modes-bench.md
+++ b/docs/qa-modes-bench.md
@@ -253,3 +253,62 @@ improve by ≥5pp on lattice modes; STRICT-rate is within noise.
 Defaults stay on.
 
 Bench artifact: `bench/qa_results/2026-05-03T23-06-21Z.{jsonl,md}`.
+
+### Addendum 3 — full-bench regression check (2026-05-03T23-30-12Z)
+
+Validates that the #000010 default flip (reminder default-on for
+lattice modes) doesn't regress narrow-question performance. The
+prior validations in Addendum 1 + Addendum 2 used the 9-question
+broad subset only; this run sweeps the full 75-question
+`bench/qa_questions.txt` (~10% broad, ~89% narrow factoid /
+descriptive / list shapes).
+
+Same harness, n=3 × 3 modes × 75 questions = 225 runs per mode.
+Compared against the frozen `15:07Z` baseline (the authoritative
+pre-#000008/9/10 state of the substrate, 71 questions × n=3 = 213
+runs per mode):
+
+| Mode                    | Pre-flip (15:07Z) | **Post-flip (23:30Z)** | Δ SR | Δ mean ratio |
+|-------------------------|-------------------|------------------------|------|--------------|
+| `quote`                 | 116S/51H/46U · SR 0.54 · ratio 0.699 | 116S/60H/49U · **SR 0.52** · **ratio 0.692** | −2pp | −1pp |
+| `claim_lattice_pointer` | 43S/146H/21U · SR 0.20 · ratio 0.642 | 48S/145H/32U · **SR 0.21** · **ratio 0.663** | +1pp | +2pp |
+| `claim_lattice` (JSON)  | 89S/82H/39U · SR 0.42 · ratio 0.698 | 99S/80H/46U · **SR 0.44** · **ratio 0.730** | +2pp | +3pp |
+
+All STRICT-rate deltas within the 5pp signal floor. Same question
+set ±2 (3 added: `winners of all major sports?`, `name all members
+of the beatles`, `list all planets in the solar system`).
+
+**Substrate-level findings:**
+
+- **Pointer-mode `FORMAT_COLLAPSED`: 0/225** across the full sweep.
+  The default-on reminder eliminates the collapse mode globally,
+  not just on broad questions where it was originally measured.
+- **Pointer-mode `NO_EVIDENCE_POINTER`: 29/225** (13%) — lower than
+  the 33% we saw on broad-only (9/27) when reminder was off.
+  Reminder discipline propagates to non-broad questions even though
+  the reminder text only fires on broad shapes (the broader signal
+  is that the reminder text reinforces the citation rule across
+  the model's session attention).
+- **Quote-mode is essentially unchanged** (-2pp SR, -1pp ratio).
+  Quote opts out of the guard (`quantifier_guard_modes` default
+  excludes quote), so this is pure Hermes nondeterminism on a
+  225-sample cell.
+- **JSON-mode mean ratio +3pp** — small but positive, consistent
+  with the broad-subset finding that reminder boosts per-claim
+  grounding density.
+
+**Latency note.** Wall-clock per call jumped from ~17-19s (pre-flip
+baseline) to ~33-35s on this run. This is **endpoint contention**
+on Hermes-3 at the time of measurement, not a feature regression
+(the new substrate adds zero LLM calls — preflight is pure regex).
+The throughput numbers in §6 of the journal pre-date this evening's
+network conditions; future bench cycles should normalize.
+
+**Verdict — no regression.** The #000010 default flip ships clean
+across the full corpus, not just the broad-quantifier subset where
+it was originally validated. Defaults stay on. The substrate is
+strictly more honest under preflight (FORMAT_COLLAPSED → 0,
+NO_EVIDENCE_POINTER ↓) without sacrificing throughput on
+non-broad questions.
+
+Bench artifact: `bench/qa_results/2026-05-03T23-30-12Z.{jsonl,md}`.