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diff --git a/en/compatibility/cts/sensor-fusion-box-assembly.md b/en/compatibility/cts/sensor-fusion-box-assembly.md
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+Project: /_project.yaml
+Book: /_book.yaml
+
+<!--
+    Copyright 2018 The Android Open Source Project
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+
+# Sensor Fusion Box Assembly
+
+This page provides step-by-step instructions for assembling a Sensor Fusion
+Box. The Sensor Fusion Box is used in the CameraITS sensor_fusion test and
+multi-camera sync test. It provides a consistent test environment for measuring
+timestamp accuracy of camera and other sensors for Android phones. It consists
+of plastic box components that are laser cut from computer-aided design (CAD)
+drawings and a Servo Control Box.
+
+You can purchase a Sensor Fusion Box or build your own.
+
+## Purchasing a Sensor Fusion Box
+
+We recommend purchasing a Sensor Fusion Box from one of the following qualified
+vendors.
+
+* *Acu Spec, Inc.*  
+  990 Richard Ave, Ste 103, Santa Clara, CA 95050  
+  fred@acuspecinc.com  
+* *MYWAY DESIGN*  
+  Website: http://www.myway.tw/  
+  Fu-ming (Troy) Tsai, tsaifuming0205@gmail.com  
+
+## Building a Sensor Fusion Box
+
+This section includes step-by-step instructions for assembling a Sensor Fusion
+Box from laser-cut plastic components (shown in Figure 1):
+
+<img src="images/sensor_fusion_assembly_box_cad_drawing.png" width="700" alt="CAD drawing of Sensor Fusion Box components">  
+**Figure 1.** CAD drawing of Sensor Fusion Box components
+
+### Required tools
+
+Before starting, ensure you have downloaded the technical drawings for the
+Sensor Fusion Box (included in the [Sensor Fusion Box 1.3.zip
+file](sensor_fusion_box_1.3.zip)) and
+have the following tools available:
+
+* Phillips head screwdriver
+* Power drill set
+* Exacto knife
+* Tape
+
+### Step 1: Apply vinyl stickers
+
+After creating the plastic components with a laser cutter, you can apply vinyl
+stickers to the plastic box components:
+
+1. Apply vinyl on the smooth side of the ABS (acrylonitrile butadiene styrene)
+   as shown in **Figure 2**. For helpful tips on applying vinyl, refer to
+   [wikiHow](https://www.wikihow.com/Install-a-Vinyl-Graphic).
+1. Cut out the necessary holes on the vinyl.
+
+    <img src="images/sensor_fusion_assembly_abs_pieces.png" width="350" alt="BS pieces">  
+    **Figure 2.** ABS pieces with vinyl applied on the smooth side (interior of
+    the box)
+
+### Step 2: Attach servo
+
+To attach the servo:
+
+1. Tap three holes on the phone fixture with ¼" - 20, and make countersink
+   holes on the back of the phone fixture:
+    <table class="columns">
+      <tr>
+        <td><img src="images/sensor_fusion_assembly_phone_fixture_holes1.png" width="250" alt="Phone fixture tap holes"></td>
+        <td><img src="images/sensor_fusion_assembly_phone_fixture_holes2.png" width="250" alt="Phone fixture countersink holes"></td>
+      </tr>
+    </table>
+    **Figure 3.** Phone fixture with tap and countersink holes shown
+
+1. With the large shaft that came with the servo, drill pilot holes with #43
+   drill bit (2.26 mm) into the last holes from each side so 4-40 screws could
+   grab onto them:
+
+    <img src="images/sensor_fusion_assembly_servo_shaft.png" width="350" alt="Servo shaft">  
+    **Figure 4.** Servo shaft with pilot holes at each end
+
+1. Apply the flat-head 4-40 screws on the front of the phone fixture and
+   tighten the shaft:
+
+    <img src="images/sensor_fusion_assembly_shaft_screws.png" width="350" alt="Shaft and screws">  
+    **Figure 5.** Phone fixture front with shaft and screws shown
+
+    <img src="images/sensor_fusion_assembly_shaft.png" width="350" alt="Shaft">  
+    **Figure 6.** Shaft on the back of fixture, tightened by screws applied
+    from the front
+
+### Step 3: Attach clamp & rails
+
+To attach the clamp and rails:
+
+1. Apply nylon thumb screws, rubber adhesive, and wire to the aluminum clamp:
+
+    <img src="images/sensor_fusion_assembly_clamp.png" width="350" alt="Clamp with rubber adhesive">  
+    **Figure 7.** Clamp with rubber adhesive, thumb screws and wire
+
+1. Screw the phone clamps' thumb screws into the tapped holes of the phone
+   fixture.
+
+    * CAD Drawing:
+
+        <img src="images/sensor_fusion_assembly_clamp_attachment_cad_drawing.png" width="450" alt="CAD drawing of clamp attachment">  
+        **Figure 8.** CAD drawing of clamp attachment to phone fixture
+
+    * Actual clamp attachment to phone fixture:
+
+        <img src="images/sensor_fusion_assembly_assembled_fixture.png" width="350" alt="Assembled phone fixture">  
+        **Figure 9.** Assembled phone fixture
+
+1. Fix rails on top and bottom of box towards the front. The figure below shows
+   6-32 screws on pre-tapped holes, but you can use self-tapping screws instead
+   if desired.
+
+    <img src="images/sensor_fusion_assembly_fixed_rail.png" width="350" alt="Fixed rail">  
+    **Figure 10.** Fixed rail on top and bottom of box
+
+### Step 4: Attach lighting
+
+To attach the light brackets and diffuser:
+
+1. Stack two handle pieces and connect using 6-32 screws (or use self-tapping
+   screws):
+
+    <img src="images/sensor_fusion_assembly_handle_pieces.png" width="450" alt="Handle pieces and assembly">  
+    **Figure 11.** Sensor fusion box handle pieces and assembly
+
+1. Prepare four 4-40 screws and nuts to fix the mounting bracket from the
+   lighting kit to the wall of the box:
+
+    <img src="images/sensor_fusion_assembly_interior_wall_screws.png" width="350" alt="Screws and bracket on interior wall">  
+    **Figure 12.** Screws and light bracket on the interior wall of the box  
+    <img src="images/sensor_fusion_assembly_exterior_bolts.png" width="350" alt="Exterior with bolts applied">  
+    **Figure 13.** Bolts applied to the screws from the exterior of the box
+
+1. Snap the lights into the brackets (can be a tight fit):
+
+    <img src="images/sensor_fusion_assembly_interior_wall_lights.png" width="450" alt="Lights on interior wall">  
+    **Figure 14.** Lights fixed to the interior wall with brackets
+
+1. Cut the light diffuser to an appropriate size to wrap the light strips:
+
+    <img src="images/sensor_fusion_assembly_light_strips_diffusers.png" width="350" alt="Light strips and diffusers">  
+    **Figure 15.** Light strips and light diffusers
+
+1. Wrap the light diffuser around the strip and tape it at the back:
+
+    <img src="images/sensor_fusion_assembly_strips_taped_back.png" width="350" alt="Strips and diffusers taped from back">  
+    **Figure 16.** Light strips and light diffusers taped from the back
+
+### Step 5: Attach phone fixture to servo plate
+
+To attach the phone fixture to the servo plate:
+
+1.  Prepare four 6-32 screws and servo plate to fix the servo onto the wall.
+    The screws go from inside and fix themselves onto the servo plate that is
+    on the exterior of the wall.
+
+    <img src="images/sensor_fusion_assembly_servo_servo_plate.png" width="450" alt="Servo and servo plate">  
+    **Figure 17.** Servo and servo plate held in place with 6-32 screws
+
+1.  Secure phone fixture onto the servo with nylocks (pushing the center of the
+    shaft into the servo's rotation center):
+
+    <img src="images/sensor_fusion_assembly_phone_fixture.png" width="450" alt="Phone fixture on servo">  
+    **Figure 18.** Phone fixture on servo
+
+1.  Screw the phone fixture onto the servo with its servo screw:
+
+    <img src="images/sensor_fusion_assembly_servo_screw.png" width="350" alt="Phone fixture on servo with screw">  
+    **Figure 19.** Securing phone fixture onto servo with servo screw
+
+### Step 6: Final assembly
+
+To complete final assembly of the Sensor Fusion Box:
+
+1.  Secure servo control box on the left of the servo with 4-40 screws from the
+    outside and fastened from the inside with nuts:
+
+    <img src="images/sensor_fusion_assembly_servo_on_wall.png" width="450" alt="Servo control box on wall">  
+    **Figure 20.** Secure servo control box onto the wall
+
+1. Tape the box together, then screw the parts together (you might need to pre-drill some holes in some parts).
+
+    * CAD drawing:
+
+        <img src="images/sensor_fusion_assembly_complete_box_drawing.png" width="450" alt="Complete box CAD drawing">  
+        **Figure 21.** CAD drawing of complete Sensor Box
+
+    * Actual Sensor Fusion Box:
+
+        <img src="images/sensor_fusion_assembly_taped_box.png" width="450" alt="Taped box">  
+        **Figure 22.** Taped box with motor assembly and servo control box and screw detail
+
+1. Print out a colored copy of the checkerboard (included in the [Sensor Fusion Box 1.3.zip file](sensor_fusion_box_1.3.zip)) on A3 (or 11 x 17 inch paper), and tape it on the opposite wall of the phone fixture.
+
+  Make sure the red dot in the center of the checkerboard is directly facing
+  the camera when placed on the fixture, as shown below:
+
+    <img src="images/sensor_fusion_assembly_checkerboard.png" width="350" alt="Checkerboard">  
+    **Figure 23.** Checkerboard printed and taped to the opposite wall of phone
+    fixture