Replaced the bellows. With a little help from the Samurai Appliance Repairman, and a couple other websites, this looked like a very straightforward job, and it was. Putting the new bellows in place was tricky... one side kept falling out before the other side was in, so I had to recruit an extra set of hands. Be sure to orient "top" and "bottom" correctly... it is clearly labeled. Stretching those wire-and-spring clamps into place was also a bit of frustration, but I finally got them. The rest of the work was mostly unscrewing and removing panels, then re-installing afterward. I notice the new bellows was a little beefier at the bottom than the original. Guess I'm not the first one who had this problem.