I think that set up has a little too much concrete.. if i were to put some in mine.. i'd put thin layers with screens and wires to hold it together (If i could get it to work) IMHO.. i really don't like the fact of using hundreds and hundreds of lbs of that stuff. Or better yet, i'd take HTM's focus.. rip off a bunch of his doors, and panels.. compress em, and put in my doors, and in my trunk to deaden my car!
