Slight sag - will grind the edges and fill in with concrete patch.
I recall standing in a Home Depot looking at an edging tool and saying, nah, I'll just have Mike trim the edges - then promptly forgot when the big day came. It's just cosmetic, of course, and won't affect the performance of the mount. But I do need to be concerned about rain so I'll grind down the sides slightly to bevel them. I'll probably obsess over it for the next week or so. :O)

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