i've never heard of anyone actually doing that. i do know that a full sheet of 3/4 at home depot is only like $20 - $25. i am not sure if you can actually even get 1" during this time of the year though. but that box does sound rather time consuming and difficult as opposed to 1", but it does sound effective. incredibly heavy, but somewhat effective. in theory that is. if you try it let me know how it turns out.
JON
