Thanks Hpropman and Stick. And Hpropman, I could probably save myself a lot of time and heartache if I just stayed with 'if it works, leave it alone' ...
I tend to need to tweak things ... it lets me discover cool things I hadn't expected, but also tends to make me lose what I knew how to do. It's why I've started taking photos of my builds ... I'm hoping to remind myself what I did, when I can't remember.