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Im building slab doors for a wardrobe. The doors will be 25Wx75H, and 1.2 or so thick. I want the doors to stay flat through time and humidity changes. I can build them as solid-core or hollow-core. To build them as hollow-core, Id use standard torsion-box construction: plywood skins separated by a grid. To build them as solid-core, Id laminate ½ ply to ¾ ply. Which construction method will be more stable, and why?