Do I want to stuff something through the holes, under the seats? It would help deaden the noise wouldn't it? I've got a bit of insulation left over from insulating behind the door cards in the back. Is there any reason I shouldn't do this? The same with behind the kick panels at the front? Also the cab doors. I've got lots of foil bubble wrap left over. I've Waxoyled inside the doors so if I tried to glue the bubble wrap it probably wouldn't stick, but is it ok/a good idea to put some in there as long as the window doesn't catch it?