Thanks, this works!
And as far as I understand you can't use <Artist> "variables" directly, right, it's all exclusively regex, so you must only do it via matches and inserts?
By the way, is there any way to see changes in real time instead of having to click on the rule to edit, edit it, exit, hit preview, see the fail and do all the needless steps again? Or at least make the rule editing window non-modal so you can edit it and hit "Preview" in the main window