I thought I had published an article o/a 06/13, describing the pipe mount you see to the right and the intended bracket for it. I removed the vertical part of the bracket. I needed a “fatter” pipe for this bracket. I used the tee fitting with a plug instead.
I still have to add two more screws to secure the bracket to the wall. I want the TV [maybe Black Friday] before I put them in. Anyway, the fitting and modification are done. It’s working for me.