I concur with others regarding the "No Service" issue after restarting. Before tearing it down again to check the antenna connection, I rebooted the Phone and then the second time I had service. So if you are fairly confident of your handiwork then definitely try this first!
As others have stated it is worth keeping a very close eye on the black earthing clip and it's positioning before removal. It is held down with the top screw and must be repositioned before the screw is fitted. I used the thinnest end of the Plastic Opening Tool to slide into the fold of the earthing clip in order to guide it into place. My Pentalobe tool was slightly magnetized so I used that to bring the screws in for tightening with the Philips screwdriver.
