A bit off-tangent, but I found this exchange in Mangini's Facebook quite funny:
Poster: "what happened there to your drumset during 2nd half of Hamburg show?"
Mangini: "What happened is that my "righty" hihat cable broke right away in that set. I had to play songs lefty on the spot. I just somehow did it and confidently waited to move the pedal out of the way a few songs later. Believe me, I don't "take the time" to learn everything both ways, but luckily, I was able to do it more easily than I imagined. That was cool. Then, I was also discussing with my tech when he could pull off possibly replacing that cable hihat. I told him I'd just play the I&W and COS lefty, but we found a spot and he replaced it with literally less one second to spare before my first hit, which I was prepared to play standing up! Those things almost never break, but it is an involved change if they do- not as bad as busting a kick drum head. So thanks for noticing."
So he was prepared to play the whole Images and Words and ACOS as lefty on the spot.
Best prog drummer indeed.