So I still don't trust my ear very much, and I've wanted to play this for a while. In the live album Stop Making Sense, they start Crosseyed and Painless in a funky, slow tempo, and right before they speed up to the song's tempo one of the guitarists teases the melody line of the chorus - I'm trying to figure out how to play that.
He plays it at about 0:37 in this video, right after the drum fill. It's tough to get a good view of the fretboard but it's somewhere around the 8th fret.
https://www.youtube.com/watch?v=gyDb4szpWmc
David plays that intro line solo with his Boss pedals and the alembic(?).
first line in on the B string
e---------------------------
B--10-----9--10-9---------
G-------------------11-----
D------------------------9-
harmony line
e--9------10-7----7-9-77---------------9-10--12-14-7----7-9-77---
B-----------------------------------------------------------------------
G-----------------------------------------------------------------------
D----------------------------99---------------------------------------99-