Great job with the redrawing! Couldn't you save them as PNG files and save some space though? I tried opening one of the pages in this chapter in paint.net and save it as a png png with 8bit color and it would be half the size with 8 bit color depth. This would make it go from a 3 mb jpeg to a 600 kb png. If you did this from the raw redraws then it would be real small and look basically the same.
I could be talking nonsense though, I don't know shit about redrawing. Please correct me if I'm wrong.
More tricks to make PNG's smaller: https://mangadex.org/thread/242338