The original has low resolution (half the usual resolution of Twitter extras), which made it hard to clean and redraw. I made the mistake of trying to do the translation on a scaled up image. It didn't look good when I scaled the image back to the original resolution. Fixing most of it was easy, but I had to redo from scratch the background in the top right corner and in Kobayashi's speech bubble.
Every time this manga gets another award or nomination, I remember how some weirdo tried to prove to me that this title is not one of the best these years.