I thought I'd post an update. I finished the veneer on my sub a couple weeks ago. Now I need to redo the finish on the speakers.
I discovered that the wimpy seal provided with the driver did not hold and so I sealed it with silicon this time around. I also removed the exorbitant amount of polyfil I had stuffed into it and lined the walls with fiberglass insulation instead. Whether it was the seal, stuffing, or a combination of both, the sound has certainly improved and I could not be more happy with this sub.
By the way, I have no idea how to resize/thumbnail inline images. Any advice?