It's also better than nothing! And really, I've looked at davidfor's code, Kobo would have to break ePub compatibility to stop his tweak from working. It's just a change to the CSS already in a book, doesn't change the library cooy, and gets applied every time the book is sent. And pretty slick
I'm also doing some CSS tweaks, but I decided not to use this kepub CSS because I'm interested in generating files that could be used on any ePub reader post-conversion. I also went a different way from davidfor, but Kobo would have to break ePub compatibility to stop my tweak from working, which I don't see happening barring a company-wide bout of insanity. Which I guess
technically possible...