If you need ceiling extensions and have a larger sided projector then this mount may not be for you. There is too much play in detail with add-ons, particularly those built in cathedral ceiling style, for detailed alignment to be easily accomplished and to remain so over time. I also think other products look better (smoother and more professional) than this one and even a little cheaper. I returned this product and chose the reliable QualGear, whose system is much more reliable and customizable.
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