diff --git a/data_only_viz/hand_slots.py b/data_only_viz/hand_slots.py
index 30b5eb5..3686004 100644
--- a/data_only_viz/hand_slots.py
+++ b/data_only_viz/hand_slots.py
@@ -20,24 +20,9 @@ from __future__ import annotations
 
 import math
 
-
-# ---- micro-helpers (duplicated from hand_features to avoid circular import) ---
-
-def _finite(v: float, fallback: float) -> float:
-    return v if isinstance(v, float) and math.isfinite(v) else fallback
-
-
-def _coord(p, attr: str, idx: int, fallback: float = 0.5) -> float:
-    if hasattr(p, attr):
-        return float(getattr(p, attr))
-    try:
-        return float(p[idx])
-    except (TypeError, IndexError):
-        return fallback
-
-
-def _clamp(v: float, lo: float, hi: float) -> float:
-    return lo if v < lo else hi if v > hi else v
+# ---- micro-helpers imported from hand_features (acyclic: hand_features only
+# imports hand_slots lazily inside step(), so a top-level import here is safe) ---
+from .hand_features import _finite, _coord, _clamp
 
 
 def _hand_size(hand) -> float:
diff --git a/data_only_viz/main.py b/data_only_viz/main.py
index 96b1646..b6516ca 100644
--- a/data_only_viz/main.py
+++ b/data_only_viz/main.py
@@ -281,9 +281,9 @@ class AppDelegate(NSObject):
         # stage no-ops. Activated via POSE_FILTER=...+arkit_fuse.
         try:
             from .iphone_osc_listener import IphoneOSCListener
-            self._iphone_osc = IphoneOSCListener(self._state)
+            self._iphone_osc = IphoneOSCListener(self._state, port=_cfg.iphone_osc_port)
             self._iphone_osc.start()
-            LOG.info("worker: + iPhone OSC listener :57128")
+            LOG.info("worker: + iPhone OSC listener :%d", _cfg.iphone_osc_port)
         except Exception as e:  # noqa: BLE001
             LOG.warning("iphone OSC listener start failed (%s)", e)
         # ICP LiDAR fusion (opt-in via ICP_FUSION=1). Parallel to the
diff --git a/data_only_viz/renderer.py b/data_only_viz/renderer.py
index 8d8ef91..0f19ccd 100644
--- a/data_only_viz/renderer.py
+++ b/data_only_viz/renderer.py
@@ -169,6 +169,7 @@ class MetalRenderer(NSObject):
         # Chirality validated correct live 2026-07-02; keep False unless a
         # future iPhone app build flips it.
         self._hand_swap_lr = _cfg.hand_swap_lr
+        self._arkit_full = _cfg.arkit_full_skeleton
         self._init_skel_cpu_buffer()
         self._init_mesh_cpu_buffer()
         self._build_pipelines()
@@ -339,7 +340,7 @@ class MetalRenderer(NSObject):
         Priorise MediaPipe (body 33 + face 478 + 2 mains 21) si disponible
         et present ; sinon fallback COCO 17 keypoints YOLO."""
         _arkit_now = time.perf_counter()
-        use_arkit = (ARKIT_FULL and bool(s.arkit_parents)
+        use_arkit = (getattr(self, '_arkit_full', ARKIT_FULL) and bool(s.arkit_parents)
                      and arkit_2d_fresh(s.persons_arkit_2d_t, _arkit_now))
         if not use_arkit and not s.pose_alive():
             return 0