Update README.md

mechanism/README.md

@@ -1,19 +1,12 @@
 # Mechanism
 
-![Body](imgs/mech_body.png)
-
 ## 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. 
+### Servos
 
->    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.
+18 TowerPro [MG92B](http://www.towerpro.com.tw/product/mg92b/) are required.
 
+> The dimension of 3d printed part is highly dependent on the servo's size. Modification is required if you want to use alternative servos.
 
 ### 3D-Printed Parts
 
@@ -23,7 +16,6 @@ An hexapod requires 18 of them.
 | -------------- | ------------------------------------------- | -------- |
 | body_top       | ![body_top](imgs/body_top.jpg)             | 1        |
 | body_bottom    | ![body_bottom](imgs/body_bottom.jpg)       | 1        |
-| body_center    | ![body_center](imgs/body_center.jpg)       | 1        |
 | body_side_wall | ![body_side_wall](imgs/body_side_wall.jpg) | 2        |
 | body_back_wall | ![body_back_wall](imgs/body_back_wall.jpg) | 1        |