Looks real goo!.
How did you make the tube for the speaker? Do they sell those? Second, how did you connect the supports into the tube if it's a heavy cardboard. Doesn't that not have enough "umph"?
It does look very professionally done.
Does anyone wonder why their is a small (maybe 5 or 6 inch) circular hole already cut in the metal of the deck on the right side? Weird, but that's where my woofer is now.