BTW, I got the adjustment cup out. It wasn't too bad, actually. I used a pair of needle-nose pliers, stuck them into the holes and twisted. With a bit of force, it came right out. The BB was filthy. A surprisingly large heap of dirt poured out, but with a bit of soap and water, it's spinning nicely again. Now... what to do with the stuck quill stem. I'll start another post for that.