That's funny, because I was looking at going with the 4-4 this year. We are moving up a level, we call it Jr. Pee Wee (10 & 11 year olds). I went to a coaches clinic about a month or 2 ago and a local High School coach had a class on his teams 4-4. I liked it a lot and I got a copy of a condensed version of his Defensive play book.
I know you offered before that you had some stuff. Do you have anything on the 4-4 you can e-mail me or point me in the direction where I can get some stuff it would be much appreciated.