More news from Jamtrackcentral.com, and this is big news! They have released a backing track (just drums and bass) and complete TAB package endorsed personally by Guthrie himself so you know that these are 100% accurate. The TABs include both composed and improvised parts that Guthrie plays on the album. I think this package just made it onto my Christmas wish list!
http://www.jamtrackcentral.com/jamtracks/the-aristocrats-official-backings
