Updated Sketchup Model of Sections

I have updated my old Sketchup model and changed the "below" section as I have redone my sections and changed the bottom design. In the new model I have included structural support to my "entangled" building above ground.

Only during the final stages of completing the underground design I realised that I should have created the spheres in a different way which would allow me to create ramps that cut into the ground of the spheres and therefore create more practical ramps that are less steep. I will rebuild this design and experiment with the cutting tools I have discovered to try and achieve different ramps.