Here by far is the greatest video i have seen showing how Hal Houle, Stan Shuffet, and Ron Vitello Pivot system. Like i said Rons version is pivoting yoru hips rather the using BHE.
http://www.youtube.com/watch?v=Bd4qxOy-tJw
http://www.youtube.com/watch?v=Bd4qxOy-tJw