The Knoxville Symphony Orchestra’s Chamber Classics Series on Sunday afternoons has become quite popular, with audiences gravitating to music that really benefits from the intimate acoustic environment of the Bijou Theatre. Perhaps a more important asset, though, is that the series is an enticing showcase for the orchestra musicians who are featured as soloists or ensemble members. This past Sunday’s concert, “Mozart & More”, took that idea even further than usual, featuring the KSO’s Principal Second Violin Edward Pulgar as soloist and conductor in an after intermission performance of Mozart’s Violin Concerto No. 3 in G Major, K. 216. The first half of the concert featured delightfully different programming with two ensembles drawn from members of the orchestra: a cello quartet and a brass quintet.