Originally, I wasn't really planning to post some things that are aimed for the "notebooks" here. What I was going to do was to post the original on one or more of those and either post a link here, or not post any link at all, depending on what the post was.
For the next few posts I think I'll just post them here as quickly as I can, without worrying about where they "apply". For now I'll posts the links. I need to do what's easiest and quickest for me. It doesn't matter with material "at this level". I can always shift things around/delete things (etc.) later.