diff --git a/nhf/touhou/houjuu_nue/joints.py b/nhf/touhou/houjuu_nue/joints.py
index e9f78ff..05cf0e7 100644
--- a/nhf/touhou/houjuu_nue/joints.py
+++ b/nhf/touhou/houjuu_nue/joints.py
@@ -204,7 +204,7 @@ class RootJoint(Model):
         plane = result.copyWorkplane(Cq.Workplane('XY', origin=(0, 0, -self.child_extra_thickness)))
 
         for i, (px, py) in enumerate(conn):
-            plane.moveTo(px, py).tagPlane(f"conn{i}")
+            plane.moveTo(px, py).tagPlane(f"conn{i}", direction="-Z")
         result = (
             result
             .faces(">Z")
diff --git a/nhf/touhou/houjuu_nue/wing.py b/nhf/touhou/houjuu_nue/wing.py
index 2be8c1e..985080d 100644
--- a/nhf/touhou/houjuu_nue/wing.py
+++ b/nhf/touhou/houjuu_nue/wing.py
@@ -983,9 +983,10 @@ class WingProfile(Model):
         if "s0" in parts and "root" in parts:
             (
                 result
-                .constrain("s0/base?conn0", "root/child?conn0", "Plane", param=0)
-                .constrain("s0/base?conn1", "root/child?conn1", "Plane", param=0)
-                .constrain("s0/base?conn2", "root/child?conn2", "Plane", param=0)
+                .constrain("s0/base?conn0", "root/child?conn0", "Point")
+                .constrain("s0/base?conn1", "root/child?conn1", "Point")
+                .constrain("s0/base?conn2", "root/child?conn2", "Point")
+                #.constrain("s0/base?conn3", "root/child?conn3", "Point")
             )
         if "shoulder" in parts:
             angle = shoulder_deflection * self.shoulder_joint.angle_max_deflection