General updates (MP7) :
* Updating painted zones.
* Adding details : orange arrows, letters A and M for "Automatic" and "Manual".
* Adding a screw on the left handle.

* Updating the skin and illustrations with a new CHAIN logo. Because the previous was too complex and cubic. The new logo is simpler and circular.
Moreover, I have been notified than my previous logo was too similar to some existing logos. This is another reason of changing.
I hope you will like it.

* Some corrections on alpha chanel (wear) and the skin.