Bear Defense 7 Technique?

Thanks for the reply. Maybe I didn't state the question well, what I would like to know is where people teach the 7 tech to have his hands?
His aiming point with his hands on the snap of the ball?
Where his eyes are before and directly after the snap of the ball?
How people handle the TE releasing and blocking the ILB?

Thanks

Thanks Oneback, Do you know if the video is any different than the book. I have read the book and it is very good, but my assumption was that the video would be basically the same. I also have the video entitled "Adapting the 46 Defense to High School Football" It wasn't exactly what I expected. I thought it would have some game footage and more specific info. Instead it was the basics of the 46 that was presented at a clinic.

WI Stout DIII runs a lot of 46 and their Def Cor explained that their eyes are on the backfield at the snap as they were getting ran off by the TE and leaving the C gap open. Everything else I have read/seen has the 7 tech eye balling the TE. I was wondering if anyone else uses that technique and if so to what result?