Fast and adrenalinic with high forces:
![Image](http://img154.imageshack.us/img154/6521/speak060727023648000lv3.jpg)
Layout is not complete:I'm studying the last twists to adapt them to the scenery that will be a rocky mountain.
Here a picture of a figure that I created with elementary:it's not a zero g roll but a torsion of the rail on the same axis(soon a video will show that)
![Image](http://img133.imageshack.us/img133/343/speak060727023959001ih7.jpg)