Folks,
I got my DW back today from the Mothership. Suffice to say, it is like night and day. Mica informs me that a heat bend was performed, and it did the trick. No buzz anymore - I actually lowered the action. She plays like a dream now. And the good folks in Santa Rosa were right, as usual - a heat bend is not as scary as it sounds. My bass came back in exactly the same condition it was in when I sent it. Of course, we're talking Alembic here .... ;-) Relief is .012 at the 10th/11th frets, action is 5/64 at the 24th fret on the E string, a bit lower on the G string side. It works for me.
Many thanks to the elves in Santa Rosa. She plays and sounds great. Can't wait to take her out on an open mike only to hear, geez, what kind of bass is that? ;-)
Alan