we recently completed this install, 2 42″ touch screens on each side and 1 70″ in the center. This was a complex install due to the fact that the openings for each tv were over sized by 2 inches all around. They had to be absolutely center and flush with the wall. To complicate things, they were all mounted using full motion mounts.
Anytime you use a full motion mount, there is some sag to be expected. Through years of experience and using only quality parts, most if not all of this “sag” can be eliminated. The end result is 3 tv’s that are centered in the opening and are flush with the surrounding wall.
All the support equipment, including receivers, cable boxes, 2 computers, 1 for each touch screen, are located in the basement of this building. We also installed all the structured wiring for this job.