What's the story behind Belichik and Mangini?

tankinmd said
One slant... from a source close to the Jets....

BB did not want EM to take the Jets job (same division and all)... so

when EM took the job, BB locked him out of his office...

I guess BB did not want EM to take any Pat's secrets with him to NY...
Click to expand...

I've always wondered about stuff like that... I wonder how many signals and how much terminology they had to change because Mangini knows the Patriots' playbook.