I listened to this early today when you posted it...before there was more explanation of what the project is. VERY cool project btw!
A few things to know, or remind you of.
1-I am not a guitarist.
2-I didn't know this song at all, and initially thought it was an original of yours.
3-I typically listen to the song THEN read others comments, so I'm not swayed before hearing for myself.
My first over all impression was "holy s#^t Herb! This is AMAZING!" I loved the guitar sound, and mood it created, and blown away by the vocals (lead and harmonies), and production over all.
I was stunned. I was jealous!
I kept thinking, "who did he get to sing this?" and "it sounds a little like if Vince Gill and Feetwood Mac did a song."
I read the comments and went "Oh! Ok! I get it. Still very cool!"
So my point, I liked your guitar work a lot, and felt it really gave the song a great sound/mood. The solo stood out slightly more than I am used to for a solo, but I may wrong on that. I don't remember thinking that the first pass. You know how you can OVER listen?...well, I'm sure that's why this thread is here

I will let others give you much better advice than I can, but I like the idea of the project and really liked what you did with it.
Well done Herb!