We actually have Steve Vai on another song, which we recorded in 1996, called Slow Down. It's a really cool fast song about living in the fast lane and missing the point of living. It's definitely a Rantin & Rayven tune. Thana Harris, 1 June 2000
My complete interview with Thana can be found in Andrew's book Frank Talk: The Inside Stories Of Zappa's Other People (Wymer UK, 2017).
Photo of Thana (right), with Nigey Lennon (left) and Candy Zappa (centre), taken backstage at Zappanale #13 by Eric Weaver.