Some syntax errors re.: "chosenOrient" and "orientRobust"? I'm on Firefox 60.8 and uBO but not blocking stringently, just Google Analytics from the logs.

I got overloaded by the page being fully editable/interactive AND with errors AND with foreign mathematical constructs. Somehow the possibility to edit it makes me walk on eggshells, even if it's just a local edit.

It otherwise looks good, I'd probably enjoy reading it if I was more fit. I'm going to take a walk outside now, thanks for the unintended inspiration.