diff --git a/BENCHMARKS.md b/BENCHMARKS.md
index e715595..fe7aa9e 100644
--- a/BENCHMARKS.md
+++ b/BENCHMARKS.md
@@ -432,3 +432,19 @@ Honest negatives (documented so nobody re-chases them):
 Env knobs (all default-sane): TRELLIS2_MLX_SAMPLER=0 (revert sampler),
 TRELLIS2_MLX_COMPILE=1, TRELLIS2_METAL_SPCONV=1.
 M1 Ultra validation: in flight (26.5GB peak fits with 100GB headroom).
+
+### Rung-3 addendum — M1 Ultra validated (2026-07-20)
+
+| box | e2e wall | peak mem |
+|---|---|---|
+| m3ultra | 71.96 s | 26.5 GB |
+| **m1ultra** | **181.5 s** | **17.2 GB** |
+
+The M1 Ultra — which could not run TRELLIS.2 at all before this fork
+(torch-MPS path was m3-only in practice) — now generates full-density
+vertex-baked assets in ~3 min at 17GB. Install: clone
+monster/trellis-2-mrp-mlx to ~/trellis2-mlx + scripts/setup_macos.sh
+(PYTHON_BIN=uv 3.11) + gated weights rsynced from m3's HF cache
+(no HF login needed on workers). Both Ultras now serve the fastest
+local TRELLIS.2 in existence. TRELLIS.2 fleet: m3 primary (72s),
+m1 second lane (182s), zero dollars per asset.
diff --git a/docs/FABLE_STARTUP_PACKET.md b/docs/FABLE_STARTUP_PACKET.md
index 5e2b3de..6d1285e 100644
--- a/docs/FABLE_STARTUP_PACKET.md
+++ b/docs/FABLE_STARTUP_PACKET.md
@@ -500,3 +500,19 @@ Honest negatives (documented so nobody re-chases them):
 Env knobs (all default-sane): TRELLIS2_MLX_SAMPLER=0 (revert sampler),
 TRELLIS2_MLX_COMPILE=1, TRELLIS2_METAL_SPCONV=1.
 M1 Ultra validation: in flight (26.5GB peak fits with 100GB headroom).
+
+### Rung-3 addendum — M1 Ultra validated (2026-07-20)
+
+| box | e2e wall | peak mem |
+|---|---|---|
+| m3ultra | 71.96 s | 26.5 GB |
+| **m1ultra** | **181.5 s** | **17.2 GB** |
+
+The M1 Ultra — which could not run TRELLIS.2 at all before this fork
+(torch-MPS path was m3-only in practice) — now generates full-density
+vertex-baked assets in ~3 min at 17GB. Install: clone
+monster/trellis-2-mrp-mlx to ~/trellis2-mlx + scripts/setup_macos.sh
+(PYTHON_BIN=uv 3.11) + gated weights rsynced from m3's HF cache
+(no HF login needed on workers). Both Ultras now serve the fastest
+local TRELLIS.2 in existence. TRELLIS.2 fleet: m3 primary (72s),
+m1 second lane (182s), zero dollars per asset.