One of my RE8s had a funny buzzing sound too (free air), just like the cone was tapping against something. Turns out one of the tinsel leads was touching the spider, just moved it around and the sound went away.
Will there be another one of these anytime? I never really got on this forum until this was going on and kept hearing about it but never knew where to find it. When I found it and seen the prices on the first page I almost **** my pants.