Rock guitarist extraordinaire Mike Keneally passed his “audition” with Frank Zappa almost 35 years ago, when he was only 25 years old. Impressing the always-exacting composer, guitarist and performance artist wasn’t easy. But with his keen technical ability and singular, almost-photographic-memory recall of even Zappa’s most labyrinthine compositions, the then-young FZ devotee earned his “hall pass” to the inner realms of the band leader’s legendary 1988 tour band.