Tremonti says: "He's such a quick learner - he gets everything in two seconds. He came in a few days late for our last writing session and we were kidding with him that the new songs were tough and he'd have to catch up. But he learned them in two seconds.

"From the first record to the second everyone's going to notice a big difference on the rhythm section side of things. He's the best of the best out there on bass. It's going to make a big difference."