Hey guys I've never used the mtx thunderfrom but picked up an empty one for cheap to use in an install im doing for a friend, I will be using an elemental designs sub and it will work well with the enclosure volume, there is polyfill in the box already do I need to leave it because its a plastic box or can i pull it out. (ps I don't need to make the box appear to be anylarger then it is, if that makes sense, as in I don't need the polyfil for that purpose)

thanks
greg