Bass player Jared Warren and drummer Coady Willis did the unthinkable on their third studio album — they added a guitar player. But Toshi Kasai doesn’t let 2009’s Mind the Drift sound anything like Karp or the Murder City Devils (Warren and Williams’ respective former bands). Instead he adds a new dimension to Big Business’ sound, making for metal-tinged hard rock that’s not only more melodic and accessible, but much more fun. Mind the Drift plays like it was a blast to conceive and record while still sounding heavy. “Found Art” opens assuring longtime fans that the bass is still burly and the drums are still busy while Kasai’s leads lend more to creating something catchy, rather than standing out with guitar hero bravado — especially on the opening of the thunderous “Cats, Mice.” where his fret-board work dances with and against bass lines under lyrics that hilariously muse on the relationships between felines and rodents (replete with howling catcalls on the bridge). In the similarly laughable/rocking “I Got It Online” and the epic “Cold Lunch,” Kasai’s guitars even buffer Warren’s raspy inflections.