Right on, and Thanks Joey!
I've about got this one whipped. I just had to let go and listen. There's a guy on TalkBass who's really good at sussing out McVie lines, (lives near me too) so I pinged him. He charted out Bare Trees for me last year.
You might be right about that second guitar being Chris' keys too. I don't think the guitars are overdubs. I don't even recognize this live recording... it's quite exciting to hear! At 1975, that's very early Buckingham in Fleetwood Mac, and he was still trying very hard to emulate his predecessors, (did a fine job here too, copping Danny's slide licks without a slide) then towards the end, he just lets loose. I cant tell if this is the Blasterized Strat, but it sorta' sounds more like his Les Paul... don't have that good an ear for guitars yet.
If I get bold, I might post this one afterwhile.