In the gypsy jazz field, no one does it any better than the Madison, Wisconsin based group Harmonious Wail. Group founder Sims Delaney-Potthoff says, I knew that wanted to play Django Reinhardt inspired music and pretty much talked to people and put the band together. We just got a bar gig and started by trying out tunes. We called it Uncle Cachuk for awhile, then we called it Junior Holstein. None of those really worked as the band kind of started getting liftoff and finding that we had just …