I play the harp in the rack, and usually play it crossed. I just like it better, most of the time. Of course, it depends on song. I've heard good blues players play the guitar and harp in the rack, I can't recall any names just now, though. There's no question that if I play the harp in my hands I can do it better than playing it in the rack, but then again, I really only play it with a rack because I don't have anybody to play with.