I recently saw Mark O'Connor's Hot Swing perform, the bassist is great - Jon Burr. I think he lives in New York. The show was real fun. Burr and O'Connor (violin) both played amazingly. Anyhow, Burr's upright was unusual looking, strange shape, and I'm wondering if anybody reading this knows anything about it. I didn't get a chance to talk to him, and can't provide any useful info about the bass other than the lower bout was very narrow, and it had a low-C extension. I'm just curious, and maybe someone out there knows him or has seen him play and knows something about his bass.