Hi, there is no tutorial on this currently. I am sorry.
I became a father in december, and as you can image, I dont have much time for ue4.
This is scrapped for now as I am making some different stuff on the little spare time I have left.
I am currently making some random created dungeon stuff like this : httpdonjon.bin.sh/fantasy/dungeon/ in ue4.
So who knows, I might come back around to this one day, and if I do, I will make the tutorial as I go along.
However made some interesting stuff with the little explanation I gave him in this post.
Sorry again.