yeah it's a bass tube. As for the trunk cover, it took about 45 min and a little bit of cussing. I stripped the stock cover with a razor. then took a pic of the "F" from the badge on my car and blew it up to 8x10 size. then printed it out and cut out the shape on some double sided foam and stuck that to the bare cover. then sprayed the whole thing with a ton of 3M spray adhesive. then layed out the black tweed and tucked it all around and let it sit. And that is the finished product.
I hope that is what you were asking about. If not, then let me know and now you have a how to on how to make a custom design trunk cover.