Hi Isaac!

1. The inner stringers (wall side) need to be straight. So it's a kind of quarter-turn staircase with a curved outer stringer.

2. On the outer stringer, there will be a turned newel post at the bottom, around which the end of the stringer will be folded, so to speak.

3. Then, when I look at my front tread, I notice that it's almost completely milled through the left stringer. Yet, my coordinates are entered correctly (tread edges).

Happy new year and greetings! Bart