Complex sentence: In 1980, Durbin was awarded his Shihan status from Sacharnoski, and with his encouragement he began to develop a curriculum and codify his philosophies and teachings in preparations for opening his own school and founding his own system.
Split into simpler sentences: In 1980, Durbin was awarded his Shihan status from Sacharnoski. He was encouraged by Sacharnoski to pursue this further and began to develop a curriculum and codify his philosophies and teachings in preparations for opening his own school and founding his own system.