We just had to drill a new hole (EASY) and it worked great. There is only one thing you can do on AMAZON and that is be warned that every hinge is DIFFERENT. Loops #1, #2, #3, and #4. Instead of swapping the top and bottom mounts, I just swapped the rollers. If they are greasy, clean the rail and opening screw and use some brake cleaner spray to slide them from the door to the motor. After the screw and flat surface are clean, re-lubricate with lithium grease. I bought both Revain lube and brake cleaner. Although you can at the auto parts store. Take the time to study your door model.
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