A:AnswerIf it's a flat screen, it will work. Your TV should have mounting holes in the back...the same holes that the legs are typically attached to. However, the box I received did not include the right size bolts. My flat screen has two different size bolt for top and bottom. The hardware that came with the bracket did not have both sizes.
A:AnswerThat might be tough. The IR receiver on your Direct TV box needs to be visible in one consideration. While you might be able to stuff the box between the arms behind the TV, you're going to lose a lot of the adjustability, if not all.
A:AnswerConcrete walls aren't the norm, which is why it wasn't included. I would certainly use anchors due to the incredible extension this this gets, no question.
A:AnswerThe mounting brackets has slots (estimated 1-2" in length) that allow for minor adjustment of lag screw placement, but the mount is designed for 16" spacing between studs.
A:AnswerWell I don't have a slanted wall but I'm not sure I would mount it. The connections are stiff enough, that it might work but I would not trust them to stay that way over the life of the product. If you did do this I would definitely make sure every lag bolt was securely in the middle of the wall studs. You might be better off looking at one of the high end mounts that also raise and lower the tv so that the TV adjust in 360 degrees to be safe. (I don't know if they exist but I would check out that option first.)