Wow, Alex. Just...wow. That's a really clear and precise explanation, and not at all confusing! I'm sure for someone who's never done it before it might be a tiny bit of an intimidating read. My friend asked me to explain it to her once a few years ago right? I just showed her what I was doing and pointed at usernames I think xD I'm horrid at explaining things, but you've got a knack for it!