Complex sentence: Duo Jets were more extensively chambered, again in accordance with vintage practice, and the trestle bracing of the 1959-1961 era was re-introduced on the Setzer line and other selected models.
Split into simpler sentences: Duo Jets were more extensively chambered in accordance with vintage practice. The trestle bracing of the 1959-1961 era was re-introduced on the Setzer line and other selected models.