Spiral Staircase Book Nook Scale

This is my first attempt at designing a spiral staicase. The first version was an open-concept design with no integral step support on the outside, hence requiring slicer support when printing. I did not think this would print very well and I was not disappointed. (See the extent of the tree support generated by Cura - I didn't even attemt to clean it up!) Might be good for a horror story doll house?

I then added a spiral support structure to the outside of the steps and this avoided the need for print support.

The printed model is about at the limit of acceptable resolution (the scale is 1:24) but if used in, say, a Book Nook diorama, the result might be passible.