It’s 13 years ago today that Zappa played in Budapest with hungarian jazz-musicians. Here’s an interview with Gyula Babos, guitar player – in english, for you. He’s from the jazz world, so I think he didn’t REALLY knew FZ’s stuff, but anyway, his point of view can be interesting. By the way, our friend Grizzly made it possible to listen to this jam (except soundcheck).
You can hear the change from 3/4 to 5/4 in “Impro 2” (it was called “One of a Kind” on a bootleg) at arount 10 minutes, after the bass solo.