diff --git a/mechanism/BOM.md b/mechanism/BOM.md
deleted file mode 100644
index 76607f3..0000000
--- a/mechanism/BOM.md
+++ /dev/null
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-# Bill of Materials
-
-## Servo - MG92B
-
-Servo is the key component. I use TowerPro [MG92B](http://www.towerpro.com.tw/product/mg92b/). It has metal gear (important!).
-An hexapod requires 18 of them.
-
->    The dimension of 3d printed part is highly depended on servo's dimension.<br>
->    Modification is required if you want to use other alternative servo. 
-
->    TowerPro MG92B can be found on Ebay seller [servohorns959](https://www.ebay.com/usr/servohorns959), which is listed on TowerPro official website ([Link] (http://www.towerpro.com.tw/about-us-2/)). <br>I also got mime servo from him.
-
-
-## 3D-Printed Parts
-
-### Body x 1
-
-Filename | Thumbnail | Required |
--------- | --------- | -------- |
-body_top | ![body_top](files/body_top.jpg) | 1 |
-body_bottom | ![body_bottom](files/body_bottom.jpg) | 1 |
-body_center | ![body_center](files/body_center.jpg) | 1 |
-body_side_wall | ![body_side_wall](files/body_side_wall.jpg) | 2 |
-body_back_wall | ![body_back_wall](files/body_back_wall.jpg) | 1 |
-
-### Leg x 6
-
-Filename | Thumbnail | Required |
--------- | --------- | -------- |
-thigh_top | ![thigh_top](files/thigh_top.jpg) | 1 (x6) |
-thigh_bottom | ![thigh_bottom](files/thigh_bottom.jpg) | 1 (x6) |
-joint_cross | ![joint_cross](files/joint_cross.jpg) | 1 (x6) |
-joint_top | ![joint_top](files/joint_top.jpg) | 2 (x6) |
-joint_bottom | ![joint_bottom](files/joint_bottom.jpg) | 2 (x6) |
-leg_top | ![leg_top](files/leg_top.jpg) | 1 (x6) |
-let_bottom | ![leg_bottom](files/leg_bottom.jpg) | 1 (x6) |
-foot_top | ![foot_top](files/foot_top.jpg) | 1 (x6) |
-foot_bottom | ![foot_bottom](files/foot_bottom.jpg) | 1 (x6) |
-foot_ground | ![foot_ground](files/foot_ground.jpg) | 1 (x6) |
-foot_tip | ![foot_tip](files/foot_tip.jpg) | 1 (x6) |
-
-## Others
-
-Name | Spec | Thumbnail | Required | Note
----- | ---- | --------- | -------- | ----
-Screw | M2 6mm | ![6mm](files/M2_6mm.JPG) | 54 | Servo Arm: 1 x 18<br>Joint: 4 x 6<br>Thigh: 2 x 6
-Screw | M2 10mm | ![10mm](files/M2_10mm.JPG) | 24 | Thigh: 1 x 6<br>Pin lock: 1 x 18
-Screw | M2 30mm | ![30mm](files/M2_30mm.JPG) | 36 | Servo: 2 x 18
-Nuts | M2 | ![6mm](files/M2_nut.JPG) | 36 | Servo: 2 x 18
-Pin (304) | M4 6mm | ![pin](files/pin_M4_6mm.JPG) | 18 | Servo: 1 x 18
diff --git a/mechanism/LEG.md b/mechanism/LEG.md
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index 42baff3..0000000
--- a/mechanism/LEG.md
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-# Leg Assemble Instruction
-
-Leg assembly instruction video https://youtu.be/oaAE5fC09KQ is also available.
-<a href='https://youtu.be/oaAE5fC09KQ'><img src='http://img.youtube.com/vi/oaAE5fC09KQ/mqdefault.jpg'/></a>
-
-## Preparation
-
-For one leg, you will need 3 MG92B servo and below printed parts
-
-Filename | Thumbnail | Required |
--------- | --------- | -------- |
-thigh_top | ![thigh_top](files/thigh_top.jpg) | 1 |
-thigh_bottom | ![thigh_bottom](files/thigh_bottom.jpg) | 1 |
-joint_cross | ![joint_cross](files/joint_cross.jpg) | 1 |
-joint_top | ![joint_top](files/joint_top.jpg) | 2 |
-joint_bottom | ![joint_bottom](files/joint_bottom.jpg) | 2 |
-leg_top | ![leg_top](files/leg_top.jpg) | 1 |
-let_bottom | ![leg_bottom](files/leg_bottom.jpg) | 1 |
-foot_top | ![foot_top](files/foot_top.jpg) | 1 |
-foot_bottom | ![foot_bottom](files/foot_bottom.jpg) | 1 |
-foot_ground | ![foot_ground](files/foot_ground.jpg) | 1 |
-foot_tip | ![foot_tip](files/foot_tip.jpg) | 1 |
-
-## Step 1
-
-![LegAssemble1](files/mech_leg_1.jpg)
-
-Combine `thigh_top`, `MG92B` and `thigh_bottom`, use M2x30mm screw and nut to secure them together.
-
-## Step 2
-
-![LegAssemble2](files/mech_leg_2.jpg)
-
-Grab one `joint_cross`, `joint_top` and `joint_bottom` and combine them
-
-## Step 3
-
-![LegAssemble3](files/mech_leg_3.jpg)
-
-First put 2 x `MG92B`, `leg_top` and `leg_bottom` together with M2x30mm screw and nut.
-Then attach `joint_top` and `joint_bottom` altogether
-
-## Step 4
-
-![LegAssemble4](files/mech_leg_4.jpg)
-
-Grab `foot_top`, `foot_bottom` and `foot_ground` (and `foot_top`) and assemble them.
-
-## Finish!
-
-![LegAssemble5](files/mech_leg_5.jpg)
-
-Great, you got 1 leg done, 5 more to go :)
-
-
-
-
diff --git a/mechanism/README.md b/mechanism/README.md
index 6807d43..c2227a3 100644
--- a/mechanism/README.md
+++ b/mechanism/README.md
@@ -4,19 +4,114 @@
 
 ## Bill of Materials
 
-[BOM](BOM.md)
+### Servo - MG92B
 
-## Leg Assemble
+Servo is the key component. I use TowerPro [MG92B](http://www.towerpro.com.tw/product/mg92b/). It has metal gear (important!).
+An hexapod requires 18 of them.
+
+>    The dimension of 3d printed part is highly depended on servo's dimension.<br>
+>    Modification is required if you want to use other alternative servo. 
+
+>    TowerPro MG92B can be found on Ebay seller [servohorns959](https://www.ebay.com/usr/servohorns959), which is listed on TowerPro official website ([Link] (http://www.towerpro.com.tw/about-us-2/)). <br>I also got mime servo from him.
+
+
+### 3D-Printed Parts
+
+#### Body x 1
+
+| Filename       | Thumbnail                                   | Required |
+| -------------- | ------------------------------------------- | -------- |
+| body_top       | ![body_top](files/body_top.jpg)             | 1        |
+| body_bottom    | ![body_bottom](files/body_bottom.jpg)       | 1        |
+| body_center    | ![body_center](files/body_center.jpg)       | 1        |
+| body_side_wall | ![body_side_wall](files/body_side_wall.jpg) | 2        |
+| body_back_wall | ![body_back_wall](files/body_back_wall.jpg) | 1        |
+
+#### Leg x 6
+
+| Filename     | Thumbnail                               | Required |
+| ------------ | --------------------------------------- | -------- |
+| thigh_top    | ![thigh_top](files/thigh_top.jpg)       | 1 (x6)   |
+| thigh_bottom | ![thigh_bottom](files/thigh_bottom.jpg) | 1 (x6)   |
+| joint_cross  | ![joint_cross](files/joint_cross.jpg)   | 1 (x6)   |
+| joint_top    | ![joint_top](files/joint_top.jpg)       | 2 (x6)   |
+| joint_bottom | ![joint_bottom](files/joint_bottom.jpg) | 2 (x6)   |
+| leg_top      | ![leg_top](files/leg_top.jpg)           | 1 (x6)   |
+| let_bottom   | ![leg_bottom](files/leg_bottom.jpg)     | 1 (x6)   |
+| foot_top     | ![foot_top](files/foot_top.jpg)         | 1 (x6)   |
+| foot_bottom  | ![foot_bottom](files/foot_bottom.jpg)   | 1 (x6)   |
+| foot_ground  | ![foot_ground](files/foot_ground.jpg)   | 1 (x6)   |
+| foot_tip     | ![foot_tip](files/foot_tip.jpg)         | 1 (x6)   |
+
+### Others
+
+| Name      | Spec    | Thumbnail                    | Required | Note                                              |
+| --------- | ------- | ---------------------------- | -------- | ------------------------------------------------- |
+| Screw     | M2 6mm  | ![6mm](files/M2_6mm.JPG)     | 54       | Servo Arm: 1 x 18<br>Joint: 4 x 6<br>Thigh: 2 x 6 |
+| Screw     | M2 10mm | ![10mm](files/M2_10mm.JPG)   | 24       | Thigh: 1 x 6<br>Pin lock: 1 x 18                  |
+| Screw     | M2 30mm | ![30mm](files/M2_30mm.JPG)   | 36       | Servo: 2 x 18                                     |
+| Nuts      | M2      | ![6mm](files/M2_nut.JPG)     | 36       | Servo: 2 x 18                                     |
+| Pin (304) | M4 6mm  | ![pin](files/pin_M4_6mm.JPG) | 18       | Servo: 1 x 18                                     |
+
+### Leg Assemble
 
 ![LegAssemble](files/mech_leg_exploded.jpg)
 
-Please check [Leg Assemble](LEG.md) for more detail instructions
+#### Leg Assemble Instruction
+
+Leg assembly instruction video https://youtu.be/oaAE5fC09KQ is also available.
+<a href='https://youtu.be/oaAE5fC09KQ'><img src='http://img.youtube.com/vi/oaAE5fC09KQ/mqdefault.jpg'/></a>
+
+##### Preparation
+
+For one leg, you will need 3 MG92B servo and below printed parts
+
+| Filename     | Thumbnail                               | Required |
+| ------------ | --------------------------------------- | -------- |
+| thigh_top    | ![thigh_top](files/thigh_top.jpg)       | 1        |
+| thigh_bottom | ![thigh_bottom](files/thigh_bottom.jpg) | 1        |
+| joint_cross  | ![joint_cross](files/joint_cross.jpg)   | 1        |
+| joint_top    | ![joint_top](files/joint_top.jpg)       | 2        |
+| joint_bottom | ![joint_bottom](files/joint_bottom.jpg) | 2        |
+| leg_top      | ![leg_top](files/leg_top.jpg)           | 1        |
+| let_bottom   | ![leg_bottom](files/leg_bottom.jpg)     | 1        |
+| foot_top     | ![foot_top](files/foot_top.jpg)         | 1        |
+| foot_bottom  | ![foot_bottom](files/foot_bottom.jpg)   | 1        |
+| foot_ground  | ![foot_ground](files/foot_ground.jpg)   | 1        |
+| foot_tip     | ![foot_tip](files/foot_tip.jpg)         | 1        |
+
+##### Step 1
+
+![LegAssemble1](files/mech_leg_1.jpg)
+
+Combine `thigh_top`, `MG92B` and `thigh_bottom`, use M2x30mm screw and nut to secure them together.
+
+##### Step 2
+
+![LegAssemble2](files/mech_leg_2.jpg)
+
+Grab one `joint_cross`, `joint_top` and `joint_bottom` and combine them
+
+##### Step 3
+
+![LegAssemble3](files/mech_leg_3.jpg)
+
+First put 2 x `MG92B`, `leg_top` and `leg_bottom` together with M2x30mm screw and nut.
+Then attach `joint_top` and `joint_bottom` altogether
+
+##### Step 4
+
+![LegAssemble4](files/mech_leg_4.jpg)
+
+Grab `foot_top`, `foot_bottom` and `foot_ground` (and `foot_top`) and assemble them.
+
+##### Finish!
+
+![LegAssemble5](files/mech_leg_5.jpg)
+
+Great, you got 1 leg done, 5 more to go :)
 
 Leg assembly instruction video https://youtu.be/oaAE5fC09KQ is also available.
 <a href='https://youtu.be/oaAE5fC09KQ'><img src='http://img.youtube.com/vi/oaAE5fC09KQ/mqdefault.jpg'/></a>
 
 > Note. Total 6 Legs are required.
-
-## Body Assemble
-
-TBD
\ No newline at end of file