If you are suffering from wood twisting after constructing baseboards, perhaps review the design. I use L girder construction using 2x1 flanges screwed and glued to webs of 2x1 or 3x1. This provides resistance to twisting, and also prevents sagging due to weight. Joists and risers are made with 2x1, with cleats of 1x1. I've used this method since I first read about it in 1981, and never suffered any post construction distortion.