diff --git a/nhf/touhou/yasaka_kanako/onbashira.py b/nhf/touhou/yasaka_kanako/onbashira.py
index a576050..56e368b 100644
--- a/nhf/touhou/yasaka_kanako/onbashira.py
+++ b/nhf/touhou/yasaka_kanako/onbashira.py
@@ -21,6 +21,9 @@ class Onbashira(Model):
 
     side_thickness: float = 25.4 / 8
 
+    section1_gohei_loc: float = 30.0
+    gohei_bolt_diam: float = 6.0
+
     # Joints between two sets of side panels
     angle_joint_thickness: float = 15.0
     # Z-axis size of each angle joint
@@ -349,6 +352,104 @@ class Onbashira(Model):
 
         return result
 
+    @target(name="side-panel1", kind=TargetKind.DXF)
+    def profile_side_panel1(self) -> Cq.Sketch:
+        return (
+            self.profile_side_panel(
+                length=self.side_length1,
+                hasFrontHole=False,
+                hasBackHole=True,
+            )
+            .push([
+                (0, self.side_length1/2 - self.section1_gohei_loc)
+            ])
+            .circle(self.gohei_bolt_diam/2, mode="s")
+        )
+    def side_panel1(self) -> Cq.Workplane:
+        l = self.side_length1
+        w = self.side_width
+        sketch = self.profile_side_panel1()
+        result = (
+            Cq.Workplane()
+            .placeSketch(sketch)
+            .extrude(self.side_thickness)
+        )
+        # Bevel the edges
+        intersector = (
+            Cq.Workplane('XZ')
+            .polyline([
+                (-w/2, 0),
+                (w/2, 0),
+                (0, self.bulk_radius),
+            ])
+            .close()
+            .extrude(l)
+            .translate(Cq.Vector(0, l/2, 0))
+        )
+        # Intersect the side panel
+        result = result * intersector
+
+        # Mark all attachment points
+        t = self.side_thickness
+        for i, (x, y) in enumerate(self.angle_joint_bolt_position):
+            px = x
+            py = l / 2 - y
+            result.tagAbsolute(f"holeFPI{i}", (+px,  py, t), direction="+Z")
+            result.tagAbsolute(f"holeFSI{i}", (-px,  py, t), direction="+Z")
+            result.tagAbsolute(f"holeFPO{i}", (+px,  py, 0), direction="-Z")
+            result.tagAbsolute(f"holeFSO{i}", (-px,  py, 0), direction="-Z")
+            result.tagAbsolute(f"holeBPI{i}", (+px, -py, t), direction="+Z")
+            result.tagAbsolute(f"holeBSI{i}", (-px, -py, t), direction="+Z")
+            result.tagAbsolute(f"holeBPO{i}", (+px, -py, 0), direction="-Z")
+            result.tagAbsolute(f"holeBSO{i}", (-px, -py, 0), direction="-Z")
+
+        return result
+    @target(name="side-panel2", kind=TargetKind.DXF)
+    def profile_side_panel2(self) -> Cq.Sketch:
+        return (
+            self.profile_side_panel(
+                length=self.side_length2,
+                hasFrontHole=True,
+                hasBackHole=True,
+            )
+        )
+    @target(name="side-panel3", kind=TargetKind.DXF)
+    def profile_side_panel3(self) -> Cq.Sketch:
+        return (
+            self.profile_side_panel(
+                length=self.side_length3,
+                hasFrontHole=True,
+                hasBackHole=True,
+            )
+        )
+
+    def assembly_section1(self) -> Cq.Assembly:
+        a = Cq.Assembly()
+        side = self.side_panel1()
+        r = self.bulk_radius
+        for i in range(self.n_side):
+            a = a.addS(
+                side,
+                name=f"side{i}",
+                material=self.material_side,
+                role=Role.STRUCTURE | Role.DECORATION,
+                loc=Cq.Location.rot2d(i*360/self.n_side) * Cq.Location(-r,0,0,90,0,90),
+            )
+        return a
+    def assembly_section(self, **kwargs) -> Cq.Assembly:
+        a = Cq.Assembly()
+        side = self.side_panel(**kwargs)
+        r = self.bulk_radius
+        for i in range(self.n_side):
+            a = a.addS(
+                side,
+                name=f"side{i}",
+                material=self.material_side,
+                role=Role.STRUCTURE | Role.DECORATION,
+                loc=Cq.Location.rot2d(i*360/self.n_side) * Cq.Location(-r,0,0,90,0,90),
+            )
+        return a
+
     @target(name="angle-joint")
     def angle_joint(self) -> Cq.Workplane:
         """
@@ -509,19 +610,6 @@ class Onbashira(Model):
         result.tagAbsolute("holeStatorR", (ri * math.cos(th), ri * math.sin(th), -h/2), direction="-Z")
         return result
 
-    def assembly_section(self, **kwargs) -> Cq.Assembly:
-        a = Cq.Assembly()
-        side = self.side_panel(**kwargs)
-        r = self.bulk_radius
-        for i in range(self.n_side):
-            a = a.addS(
-                side,
-                name=f"side{i}",
-                material=self.material_side,
-                role=Role.STRUCTURE | Role.DECORATION,
-                loc=Cq.Location.rot2d(i*360/self.n_side) * Cq.Location(-r,0,0,90,0,90),
-            )
-        return a
     def assembly_ring(self, flanged=False) -> Cq.Assembly:
         a = Cq.Assembly()
         side = self.angle_joint_flanged() if flanged else self.angle_joint()
@@ -542,7 +630,7 @@ class Onbashira(Model):
         a = (
             a
             .add(
-                self.assembly_section(length=self.side_length1, hasFrontHole=False, hasBackHole=True),
+                self.assembly_section1(),
                 name="section1",
             )
             .add(