Just saw Storytellers with Grace Potter and the Nocturnals. Turns out a lefty bassist recently joined her band. His name is Michael Libramento, and is a talented multi instumentalist.
I don't have a link to the Storytellers episode, but here is a link to a GMA gig he did with Grace a few weeks back.
http://www.mountainx.com/article/43444/ ... Nocturnals
Grace Potter/Michael Libramento
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