Complex sentence: After the death of the Casavant brothers, the company continued to add new innovations to their instruments including an extraordinarily reliable key contact and tracker touch mechanism which is a hallmark of the Casavant playing action.
Split into simpler sentences: After the death of the Casavant brothers, the company continued to add new innovations to their instruments. These include an extraordinarily reliable key contact and tracker touch mechanism, which is a hallmark of the Casavant playing action.