How to build a mech, the Pro's way

Now, the title says the pro's way, as it shows how to easily get you humble legged creation to walk forwards and backwards, and for those who are confused about the legs themselves can see how to make them.

To make the level easy to follow, it's split into sections:
ground floor- 3 hinged leg and example (my mech)

1st floor- 2 hinged leg and example (my mech)

2nd floor- forwards and backwards motion

3rd floor- 4 legged mech give-a-way

many people have played this level and have written comments saying that it helped them, if anything that is key and should be included that isn't, feel free to say so or post about something that would help.

http://lbp.me/v/0e2c1z