That time a French cleat system nearly took me out in my own shop
So I'm in my garage shop last Wednesday, trying to hang this massive slab of walnut I'd been saving for six months. I built this custom French cleat system for it, measured three times, leveled everything, the works. I get the cleat mounted to the studs, lift this 80 pound slab up by myself, and right as I'm sliding it into place I realize I forgot to account for the thickness of the cleat itself. The whole thing catches wrong and tips forward, sending me stumbling backward into my table saw fence. I'm pinned there, holding this slab like a giant shield, sweat pouring down my face, trying not to drop it on my foot. A neighbor heard me yell and came over to help me get it down. We had to cut the cleat off with a multitool just to get the thing free. Now I have to refinish that side of the slab and redo the whole mounting system from scratch. Has anyone else had a mounting project go totally sideways because you missed one simple measurement?