It’s been a couple days, and my brain is still a pile of mush. So I guesstimated, and raised the contrast a little more. I also decided to do away with the green tint from the previous grade. Things started to look a little too green anyway. Here is a screencap of what I did before:
Here is a screencap of my readjusted S-Curve. I hope it’s on the right track.
I’ve posted the rest of the screencaps in the spoiler tag below. Let me know if it’s better or worse!