Yeah, I was expecting it to sound just like the X-570. When I've heard any of these x- bodies work they do seem to sound the same.
If the negs do turn out alright I probably will ignore it. But I'm thinking it will get worse. It seems to be a quick mechanical gear whir. That's a good catch on I checking the foam. Even if it doesn't turn out to be part of this problem, I should do that anyway. The camera was sitting in the bottom of a closet for over 10 years so any kind of rot like that could have set in.
Thanks to all of you for helping.