REPY-1 modules. Version 1.0

Articulated modules for building modular robots. It is the repraped version of the Y1 modules that I have created for my PhD.
http://www.iearobotics.com/personal/juan/doctorado/Modulos-Y1/modulos-y1.html
Version 1.0 is the first one. It works and it is 3D printable, but the design should be improved in order to obtain a better printing quality.

UPDATE: 09/Nov/2011
A new version has been released: http://www.thingiverse.com/thing:13442

For building the REPY-1 modules, two 3D objects should be printed: the body and the head. Also, a Futaba 3003 compatible servo is needed, along with six M3 8mm bolts, 5 nuts and 1 washer.
You can have a look at these pictures to see how to build it:

http://fotos.iearobotics.com/index.php?album=modulos-repy-1

You can see one module in action in this youtube video:

http://www.youtube.com/watch?v=x7OYkaXNGrY

I apologize for my bad English :-(

In this video, you can see the minimal modular robot that can be built using two REPY1 modules:

http://www.youtube.com/watch?v=QmFV8lIZhB8

Here is a very funny video showing the kind of modular robot that can be built if you print more modules.

http://www.youtube.com/watch?v=GUuVUEFfbEg