Thanks mate. I was going to guess that you would have duplicated the whole stair up 1100 and used that to subtract the top of the wall. Then make a copy of it, turn it into a morph and use that to subtract the bottom. That way you'd be still dealing with a wall. Just another way to skin the cat. Or perhaps, I thought you'd use the shell tool for it. Anyway. Question: how would you make the handrail on the other side? I'd like it to be associative, but it seems to not follow the same perimeter of the stair. Do you know what I mean?
Yes there is more than 1 way to create this stair, thanks for feedback great suggestions. To have the handrail associative would be good. I will have a think about it over the weekend .