To complete his "Nightfly" trilogy, Fagen issued "Morph the Cat" in 2006. Steely Dan returned to annual touring that year with the Steelyard "Sugartooth" McDan and The Fab-Originees.com Tour. Despite much fluctuation in membership, the live band featured mainstays Herington, Carlock, bassist Freddie Washington, the horn section of Michael Leonhart, Jim Pugh, Roger Rosenberg, and Walt Weiskopf, and backing vocalists Carolyn Leonhart and Cindy Mizelle. The 2007 Heavy Rollers Tour included dates in North America, Europe, Japan, Australia, and New Zealand, making it their most expansive tour.