To record the Waterboys' latest album, 'Modern Blues', Mike Scott decamped to Nashville. 'I wanted to do it with an American swagger,' Scott explains, 'so I brought in the players from Nashville and from Muscle Shoals, and I think I pulled it off.' Scott stopped at The Current to talk to Jim McGuinn ahead of his show at First Avenue . . . where a 'Purple Rain' cover may just be in the offing.