Complex sentence: The Colt is essentially a PA22 Tri-Pacer with the rear seats and windows removed, only one fuel tank in the left wing, no flaps, and other detail changes to reduce cost and complexity.
Split into simpler sentences: The Colt is essentially a PA22 Tri-Pacer with the rear seats and windows removed. Only one fuel tank in the left wing, no flaps, and other detail changes were implemented to reduce cost and complexity.