I'm finishing the basement and putting 2 inch foam insulation on the floor while also adding cement board and radiant heat wire burried in self-leveling compount followed by ceramic tiling. This will bring the floor height by roughtly 3 inches. I have stairs from the first floor to a landing where a 180 degree change takes place. I'm planning on replacing the stairs from the landing to the basement floor. Due to this 3 inch difference between the landing height from the first floor and basement floor, can I make the riser height different for the bottom set of steps than the top set of steps. Don't want to do a complete new stairs and landings.