I want a stair with starting winders comprising 3 risers going through 90 degrees in a 900x900 bottom portion of stair. Then it will have a straight flight with 11 risers. See Stair with bottom winderattached sketch. How do I do it? Archicad can draw the most amazing stairs that might be wanted by 1% of users. Yet drawing simple winders required by many might just be beyond its ability.