This is mostly for MrJameGumb because I think you mentioned having this pattern and contemplating doing it on black as well. The sign back stitching. The back stitching... If I'd been able to do it with a single thread I think it would have looked much cleaner. But I needed two to get any visibility. I actually kind of like the top two rows of kanji. That third row... It was not great. Too much in too little space. But that's all of the back stitching. I have realized a danger I'm going to encounter with all of the rain. It's going to be hard to tie off in the open. Hopefully I can figure something out. At any rate onwards and upwards.
That does look incredibly tricky! I think it looks pretty good though! All the half stitches involved makes me question if I want to try it yet or not lol I think you're right though, single strand would be almost invisible here...