couple of vids i found - both was interesting for me

[ame]http://www.youtube.com/watch?v=woPJR5dL8Q0[/ame]
and
[ame]http://www.youtube.com/watch?v=mA0IlU69MD4[/ame]


[ame]http://www.youtube.com/watch?v=woPJR5dL8Q0[/ame]
and
[ame]http://www.youtube.com/watch?v=mA0IlU69MD4[/ame]
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