The issue I found with the ebay ones are the threading in the plastic block are poorly tapped. This make the screw mechanism significantly harder for the motor to turn. I am concerned the additional torques needed by the motor to open the latches will strip the plastic gear in motor drive. My attempted remedy was to use a drill with the screw drive to work it back and forth while spraying lithium grease. After about 10 minutes of this the resistance in the threading was 50% less. I think anyone attempting this should compare the torque needed on the old vs. the new. It would suck to put the whole top back together and blow your gear drive on the motor. Just my 2 cents. This weekends project.