I recently installed a plinth for Wittman Estes architecture and landscape. Wittman Estes designed this staircase and platform combo using reclaimed doug-fir and appearance grade steel stringers. Everything went together well enough, but it took some time getting the miters to close given the light cupping of a few planks. I hand planed many of the treads to remove most of the crown where needed and used a clear finish to seal the wood. We also made the last-minute decision to hide the angle-iron on the floor in the legs of the plinth which took some time on the table saw and a little chisel work, but the result was worth it.