Just finished replacing a flight of stairs in the flat. The old set were cracked, split, all different sizes in rise and tread and all over the place on the level. I replaced them all with MDF risers and treads, all of regulation sizes and all level!. The original stairs are still underneath (the previous set had been built over the top) I built each step individually, all are glued and screwed into each other.
Just got to do newel post and spindles
Just got to do newel post and spindles