diff --git a/notebook_nueva/hinged_lid.py b/notebook_nueva/hinged_lid.py
new file mode 100644
index 0000000..f97286b
--- /dev/null
+++ b/notebook_nueva/hinged_lid.py
@@ -0,0 +1,150 @@
+import cadquery as cq
+from cadquery import exporters
+
+from modelo import (
+    height,
+    mounting_pillar_positions,
+    ti_depth,
+    ti_radius,
+    width,
+)
+
+hinge_radius = 6
+screw_radius = 1.5  # M3
+ring_radius = 5  # M3
+hinge_offset = max(p[1] for p in mounting_pillar_positions) + 6
+thickness = 5
+hinge_width = 25
+
+
+def model():
+    # Create the basic shape of the case bottom.
+
+    model = (
+        cq.Workplane("XY")
+        # Hollow box
+        .box(width, height, 5)
+        # Outer surface of the hinge
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox")
+        .center(height / 2 - hinge_offset, -hinge_radius + thickness / 2)
+        .tag("rightSide")
+        .placeSketch(cq.Sketch().circle(hinge_radius))
+        .extrude(-width)
+        # Cut middle section
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox", offset=-hinge_width)
+        .center(height / 2 - hinge_offset, 0)
+        .placeSketch(cq.Sketch().trapezoid(hinge_radius * 2 + 0.1, 20, 90))
+        .cutBlind(-width + 2 * hinge_width)
+        # Hole for screws
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox")
+        .center(height / 2 - hinge_offset, 0)
+        .placeSketch(cq.Sketch().circle(screw_radius))
+        .cutBlind(-width)
+        # Holes for rings & screw heads
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox")
+        .center(height / 2 - hinge_offset, 0)
+        .placeSketch(cq.Sketch().circle(ring_radius))
+        .cutBlind(-5)
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox", offset=-width + 4)
+        .center(height / 2 - hinge_offset, 0)
+        .placeSketch(cq.Sketch().circle(ring_radius))
+        .cutBlind(-5)
+        # Split hinge halves
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox", offset=-hinge_width / 2)
+        .center(height / 2 - hinge_offset, 0)
+        .placeSketch(cq.Sketch().trapezoid(hinge_radius * 2 + 1, hinge_radius * 2, 90))
+        .cutBlind(2)
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox", offset=-width + hinge_width / 2)
+        .center(height / 2 - hinge_offset, 0)
+        .placeSketch(cq.Sketch().trapezoid(hinge_radius * 2 + 1, hinge_radius * 2, 90))
+        .cutBlind(-1)
+        # Threaded inserts
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox", offset=-hinge_width / 2)
+        .center(height / 2 - hinge_offset, 0)
+        .placeSketch(cq.Sketch().circle(ti_radius))
+        .cutBlind(-ti_depth)
+        .faces(">X")
+        .workplane(centerOption="CenterOfBoundBox", offset=-width + hinge_width / 2)
+        .center(height / 2 - hinge_offset, 0)
+        .placeSketch(cq.Sketch().circle(ti_radius))
+        .cutBlind(ti_depth)
+        # Split two halves
+        .workplaneFromTagged("rightSide")
+        .placeSketch(
+            cq.Sketch()
+            .polygon(
+                [
+                    (0, 0),
+                    (-hinge_radius - 0.2, 0),
+                    (-hinge_radius - 0.2, hinge_radius),
+                    (0, hinge_radius),
+                    (0, 0),
+                ]
+            )
+            .circle(hinge_radius, mode="s")
+        )
+        .cutBlind("next")
+        .workplaneFromTagged("rightSide")
+        .workplane(offset=-hinge_width / 2)
+        .placeSketch(
+            cq.Sketch()
+            .polygon(
+                [
+                    (0, 0),
+                    (hinge_radius + 0.2, 0),
+                    (hinge_radius + 0.2, hinge_radius),
+                    (0, hinge_radius),
+                    (0, 0),
+                ]
+            )
+            .circle(hinge_radius, mode="s")
+        )
+        .cutBlind(-hinge_width/2)
+        .workplaneFromTagged("rightSide")
+        .workplane(offset=-width+hinge_width)
+        .placeSketch(
+            cq.Sketch()
+            .polygon(
+                [
+                    (0, 0),
+                    (hinge_radius + 0.2, 0),
+                    (hinge_radius + 0.2, hinge_radius),
+                    (0, hinge_radius),
+                    (0, 0),
+                ]
+            )
+            .circle(hinge_radius, mode="s")
+        )
+        .cutBlind(-hinge_width / 2)
+        .workplaneFromTagged("rightSide")
+        .workplane(offset=-width + hinge_width / 2)
+        .placeSketch(
+            cq.Sketch()
+            .polygon(
+                [
+                    (0, 0),
+                    (-hinge_radius - 0.2, 0),
+                    (-hinge_radius - 0.2, hinge_radius),
+                    (0, hinge_radius),
+                    (0, 0),
+                ]
+            )
+            .circle(hinge_radius, mode="s")
+        )
+        .cutBlind(-hinge_width / 2)
+    )
+
+    return model
+
+
+if __name__ == "__main__":
+    model = model()
+    exporters.export(model, "hinged_lid.stl")
diff --git a/notebook_nueva/hinged_lid.stl b/notebook_nueva/hinged_lid.stl
new file mode 100644
index 0000000..2b3b6ee
Binary files /dev/null and b/notebook_nueva/hinged_lid.stl differ