John M Crymes
John M. “Jack” Crymes Jr. provided technical assistance to Rush on the Canadian leg of their ‘Exit Stage Left’ tour. Having studied electrical engineering at the University of Virginia, he was seen as a pioneer of mobile audio recording, building the world’s first mobile recording truck in 1974. As well as Rush he worked with Bob Dylan, Bruce Springsteen, Eric Clapton, Paul McCartney, and Natalie Cole. He died in May 2009.