I took my Techno Estoril apart to sandblast it and paint it because it got trashed last season. When I took it apart all the fiberglass stuff was crumbly and black and fell apart. What can I replace this stuff with? I know I have read a thread about this before, but couldn't find anything when I searched so sorry for the easy/dumb question if this comes up a lot. Any disadvantage of not putting anything back in there other then the deafening noise? Thanks!