I'm having trouble with that last pair of notes. The F-Bb sounds dissonant -- a half step flat (7-7) sounds good to me. I bet Jim makes this work somehow -- would love to hear him play it.
I am huge JJ Cale fan (as well as Campy fan! actually have met both too), so you got me listening now... and trying that out tomorrow, too, of course.
Eager to find out what might be JJesque about it. I know he plays the b5 quite a lot, and stays pretty much in major/minor pentatonics for solos. I actually have had JJ Cale blog to figure out his songs, covered about a hundred so far: http://pickingjjcale.blogspot.com/