Not sure if this has been listed here, but i found it quite interesting and might help those who driving 6spd gb
http://electronicdesign.com/article/articles/what-s-all-this-double-clutching-stuff-anyhow-6137.aspx
http://electronicdesign.com/article/articles/what-s-all-this-double-clutching-stuff-anyhow-6137.aspx