G.T.Master Replace Circuit Control Board for GT1100DC and GT1800DC Sliding Gate Openers

This looks like the right circuit board, it fits like the right circuit board, but it didn't work... why? Because there was one tiny little silver element (transistor? connector? switch thingee?) missing - like, there was room for it but it wasn't there. We couldn't figure out why it didn't work. My handyman pro was convinced it should work - until I showed him that tiny little difference between the old one and this one. You have to look carefully in the picture because the picture shows it isn't there... but if you don't know what you're looking for, you will miss it. Did I get what I ordered? Yes. Was it the right circuit board because of that teeny tiny little silver sliver that was missing? No. (The missing element was near the edge, in case that's helpful.) So make SURE this has all the right elements before you order it.