Johnson tells Hard N Fast: "Robbie has a flawless reputation in the business of being a great player and a great guy. At this point for us, being able to travel and be around somebody that you dig is every bit as important as the playing ability.

"Robbie came in and just crushed the audition. We gave him a couple of Black Star Riders songs and a couple of Thin Lizzy tunes and he killed it. He's got such a great attitude.