Well, the one I have came with rubber tubing on the neckpiece, and works pretty well. One odd thing, I turned it backward from the way it was when I bought it, and it seems to work much better that way. I can't play the way I would with my hands, but tend to play different things, and I'm tending to do more muted percussive things on guitar than I would--it seems to sound good off the harp that way. I do have a natural twitch in my neck that helps me fan notes, not exactly like hand-fanning, but it's its own thing. Need to listen to these guys, for now the novelty of adding slithery lines is good fun.