Well, I've completed the only full version of the largest design in the napkin. It is ALMOST perfectly centered, so now I'm quite annoyed with myself for not trying to plan that.
Granted, I don't think I could have, as there was a tiny stain in the corner and I had to make sure it would be covered up.
Anyway, I'm pleased with the progress and can't wait to be done! There will be another break from this project though, while I finish the third border on my "une fille formidable" piece.