diff --git a/notebook_nueva/audio_plug.py b/notebook_nueva/audio_plug.py
index 625b66b..baabceb 100644
--- a/notebook_nueva/audio_plug.py
+++ b/notebook_nueva/audio_plug.py
@@ -7,9 +7,8 @@ from utils import extrude_shape, punch_hole
 # The hole is for a random USB sound card.
 # Consumers should set proper offsets for the hole
 
-# FIXME: use actual sizes
-item_w = 40
-item_h = 20
+item_w = 49
+item_h = 20.5
 
 hole_w = 17
 hole_h = 5
diff --git a/notebook_nueva/modelo.py b/notebook_nueva/modelo.py
index edaecb3..bcc4783 100644
--- a/notebook_nueva/modelo.py
+++ b/notebook_nueva/modelo.py
@@ -45,22 +45,19 @@ mounting_pillar_positions = [
 ]
 screen_pillars.init(mounting_pillar_positions, thickness - shell_t)
 
-# Thing to "grab" the hub so it stays in place
-# Distance from left edge to center of USB plug
-usb_offset = width - 48
+# Offset for the USB port from back-left corner
+# of the case to left side of the hub
+usb_offset_x = width - audio_plug.item_w - usb_hub.item_w
 
 
 # CPU holder position from back-left corner of the case
-cpu_offset_x = 180
-cpu_offset_y = 3
+cpu_offset_x = 177
+cpu_offset_y = 2
 
 # Battery holder position from back-left corner of the case
 battery_offset_x = 15
 battery_offset_y = 3
 
-# Offset for the USB port from back-right corner of the case
-usb_offset = 48
-
 
 def model():
     # Create the basic shape of the case bottom.
@@ -86,7 +83,7 @@ def model():
         thickness=thickness,
         bottom_face="<Z",
         back_face=">Y",
-        offset_x=width - usb_offset,
+        offset_x=usb_offset_x,
         offset_y=0,
         shell_t=shell_t,
     )
diff --git a/notebook_nueva/usb_hub.py b/notebook_nueva/usb_hub.py
index 3be6dd8..1deac81 100644
--- a/notebook_nueva/usb_hub.py
+++ b/notebook_nueva/usb_hub.py
@@ -8,10 +8,13 @@ from utils import punch_hole, extrude_shape
 # (from the bottom face to middle of the hole)
 # Consumers should set proper offsets for the hole
 
+item_w = 17
+item_h = 93
+
 holes = [
     # USB-A port
     {
-        "x": 0,
+        "x": -item_w / 2,
         "y": 4,
         "shape": cq.Sketch().trapezoid(13, 5, 90, mode="a").vertices().fillet(1),
     },
@@ -20,22 +23,33 @@ holes = [
 elements = [
     # Thing to grab the hub
     {
-        "x": 0,
+        "x": item_w / 2,
         "y": 5,
         "shape": (
             cq.Sketch().trapezoid(22, 10, 90, mode="a").trapezoid(17, 10, 90, mode="s")
         ),
         "height": 8,
     },
+    {
+        "x": item_w / 2 + 5,
+        "y": item_h - 3,
+        "shape": (cq.Sketch().circle(2.5, mode="a")),
+        "height": 8,
+    },
+    {
+        "x": item_w / 2 - 5,
+        "y": item_h - 3,
+        "shape": (cq.Sketch().circle(2.5, mode="a")),
+        "height": 8,
+    },
     # Outline
     {
-        "x": 0,
-        "y": 35,
+        "x": item_w / 2,
+        "y": item_h / 2,
         "shape": (
             cq.Sketch()
-            # FIXME: use actual size
-            .trapezoid(17, 70, 90, mode="a")
-            .trapezoid(15, 68, 90, mode="s")
+            .trapezoid(item_w, item_h, 90, mode="a")
+            .trapezoid(item_w - 2, item_h - 2, 90, mode="s")
             .vertices()
             .fillet(3)
         ),