Re: how to make all greens the same?

Well, how do you percent green ?
On a white wall ? Like wine growing up ?
Or trees in a wood with a brown floor ?
What about a green meadow with a blue sky above ?
My point is that green will always look a little different and you should be able to compensate for that.
So, first thing, stay away from the scopes ;)
They are some tech tool and dont see the image itself.
I would make a secondary using the HLS key for a certain green and then try how good this will work on other shots...just analyzing..not doing anything yet..
Then you should find out how much the images are actually different from each other.
The same green is a good idea in one scene, because it needs to cut, but maybe in a later scene it will work against the rest of the colors and look like Flubber.
Trust your eyes and your gut feeling..
And take time to make an initial grading pass to level our your shots...

Have fun :)