
TL:DR - perfectly centered will offset your TV by 1 inch when used with a thin 546. Either imagine 546 and then measure to center (then remove to hang) or just expect to nudge the TV after installation to get it back to center. LONG HISTORY: It features pre-drilled and tapped mounting holes for a variety of bird mounts. Their website says it works for Thin 545 and Thin 546 but they only advertise 545 as working. That means they tell you 546 only works if you go to page 546. The off-center line is different from Thin 545. I have a perfectly centered stud adapter, a perfectly centered Thin 546 mount. Once the Thin 546 mount is attached to the stud adapter, you will notice that the TV is offset 1 inch to the right of center. SUPER annoying and a real pain to adjust and center, but you can get it back on center. It just takes a lot longer and makes all your previous calculations meaningless.

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