You're welcome, Kev. Here's an article quoting Mark Arnquist who was in charge of special repairs at the Rickenbacker factory from July 1972 to October 1976. He describes the repairs to Paul's 4001S just prior to the Wings Over America Tour: http://www.thecanteen.com/arnquist.html
wasn't pauls first violin bass (the one he had a refurb on and used for the 'revolution' promo)pinched/stolen at some point and never retrieved?anyone have any info on this?