It is 2 separate pieces, but it is pretty tight. After many hours watching, even with the vibration, the projector is still aimed perfectly at the screen. If it were loose, I think it may have eventually slipped a bit. I had the same style when I had my Panasonic PT-AE900U and my EP500s and there was never an issue, but the PT-AE-3000U is quite a bit bigger (side to side) and the new subs put out more bass.

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