Complex sentence: Farner, Brewer, and Schacher decided to give Grand Funk another try in 1980 until Schacher balked at relocating to California; according to Mark Farner in several interviews since, Schacher developed a distaste for flying and elected to stay behind.
Split into simpler sentences: Farner, Brewer, and Schacher decided to give Grand Funk another try in 1980. However, Schacher had developed a distaste for flying and elected to stay behind.