Tested the method using the rubber seal, first sponge underneath the seal, and the second piece of sponge in the gap below. Preliminary findings are that the wind noise seems to be muffled a little more at speeds <60mph, but it's still present and loud at >70mph. It does seem to be a little more inconsistent than it was before (which is a good thing), but that harsh, crispy, wind noise is still there. I did notice that the 2nd sponge doesn't cover the entire opening, so I may try to put a larger piece in there to seal most of the gap and see if that makes a difference.