Thanks for the tip, Sidroe. No, contrary to my usual M.O. I haven't done much dissection beyond the main controls yet. I was having too much fun with it out of the box.
Very cool that there is so much you can customize. Although after some experimentation it seems most of the defaults are well-chosen. Why MIDI velocity for key click is enabled by default is a mystery, though. Does that mimic some real B3 behavior I'm not aware of?
Changing vibrato scanner depth during playback caused it to crash with an access violation, but that was not repeatable.