I think everything is sealing fine and I do believe that everything is working ok now. As I mentioned the sound that I think I am hearing now sounds like it may be comming from the port. Even with a large port, I think that some port noise is bound to show up when the sub is pushing extreme amounts of air. As long as this noise is never audible from my couch then I think it is a non-issue.

I will report back after I have had a chance to listen to my sub more.

-David