I updated the diagram (v1.2) to fix a small typo and adjust also a couple of shapes. Thanks to Joshua Liebster & Bert Bouwhuis for driving my attention to this.
I know everybody skips to the diagram so I'll save you the introduction, just make sure to quickly go through the notes that follow it:

This is [...]

I'm a big believer in the saying "A picture is worth a thousand words". If you don't believe in that, then this blog will never be the right place for you. I think there is a fair amount of my blog readers who had actually visited me in my office, and they've seen how I [...]