DislikedBob,
I wasn’t going to post again, but I saw another way of presenting the diagram back in my post #122. I’ve attached the extended image below. Hopefully it will also help others to see where LazyPawn, 2+2=4ex, pipmutt etc are coming from.
To get the background, you’ll need to work through post #122, step by step. But if you take the time to do this, you’ll see why Merlin coined the term "nedging" (newbie...Ignored