Although my upper case installation went perfect and my macbook Air never operated better all of the sudden my mouse pad , the part that clicks somehow started to respond slow and now takes more tan one or two clicks to register but I do not think it's your fault. If you have any suggestions on how to make it work better it would be appreciated, maybe If I tried to clean it out with isopropyl alcohol to clean it, it might help.

Kind Regards, It was fun fixing my macbook air.

Also It would have helpful to have a few extra small screws as I stripped one in the display to top case connection.