About this 3D model

Learning while having fun, build the Chambord staircase way puzzle. Another way to reproduce the staircase. The famous staircase of Chambord, double spiral of Da Vinci. see photos. I stopped at seven steps but you can go to nine, and more if you double with a large base. It's easy, it's for children from 7 to 77 years old! Take the gcode files, or stl scale 0.08. NOP21