The FI->TN wall beat (4.77 cm at 7.06 m) was the lower-mouth flare: the full mouth radius was assigned to the penultimate control point, a one-segment radius jump. The shared route builder now blends to the mouth radius over 12 m with a smoothstep. Wall ripple 1-2: 7.27 -> 1.62 cm. All three passages pass support/blocked/grade/ripple/naturalness; controls detected. Fast tier 269/269 incl. the new-plan stage; W1/W8/W12 equal, Clang and GCC. Hash pins: FI style 2 re-pinned at v213. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1