I think I get how to do it, but what is this node!?

I think I get how to do it, but what is this node!?

What I understood is that you already have a somewhat working method where you use a sphere trace. The functionality I suggested would replace / augment it. Rather than sphere trace which produces a single point of contact, you run up 4 line traces instead.
Thankyou so much for the help and your patience.
I ended up taking what you had, and a bit of what I had and merging them and got it working.
I’m not gonna say it was easy but without your help it would have been impossible.
Cheers
Ah, wicked! And we found 2 engine bugs in the process 