Product review (2 stars): Weak rope
This part - although an improvement over the original design - still lacks the structural engineering that is needed for robust part replacement. After replacing the 2 piece unit which was easy to do the door lasted about a month before the rope in the plastic collar failed. A kevlar strand or wire wrapped cable would be much better than any of the products offering rope in plastic design. The failure takes place in the plastic part as it breaks away in the 1/4 lip which has the highest tension in the assembly. Although there are not many alternatives - perhaps spraying silicon lubricant on the rope and pulley might reduce friction and possibly enhance life.