Was directed to an interesting article, it includes excerpts from an interview with Rick Turner:
 
the phil lesh quad bass...

excellent article,
thank you!!!!

Thanks for posting. I love a good Dan Schwartz/Phil Lesh/Rick Turner story.
Did I ever tell you folks that I've crossed paths with two men named Dan Schwartz in my life, and both of them were musicians?
True story.

I like Rick Suchow's site for the bass-related memorabilia and interesting info.  It also includes some isolation clips of McCartney from the Sgt Pepper era.  What's better are the significant number of Jamerson clips (isolating bass).  Unfortunately, these require a password (which Rick says he'll Email).  I listened to them all before they became restricted (to avoid a copyright issue) and found them very interesting.  Kudos to the folks who make this kind of stuff available to the rest of us.

Although it's a big file, I think it's definitely worth downloading the old GD newsletter linked to in the blog - valuable info on Phil's quad bass!

There's good stuff at http://www.dozin.com/, too.