Nice that you (now!) also show a picture in which the mentioned staircase can actually be seen. I did not speak disparagingly - the picture of the devastation really looks exactly like the kind of massacre that DIYers cause with mega turbo power tools when they don't have co-moderator Albert Borland ;-)
Hello,
I felt it that way, if it was not so then I ask for forgiveness.
Best look for yourself, here I have a few more pictures in which you can see more.
How big is the effort?