For me this was a little bit more challenging than other lectures, I don’t know if blender got buggy at a certain point, but couldn’t really automatically merge the vertices with the snapping tool: It just didn’t work.
In the end I just restarted the software and i managed to get it done right and with all the normals in the correct orientation.
I found really helpful repeating the whole ramp construction from the beginning over the opposite side of the pyramid.
Also be careful because I think there are some slight layout differences in the snapping tool latest version of Blender 2.79. Don’t get confused they just work in the same way
