From what I know the real Early Skunk is done by mid september. But if you really think they still have time its best to wait it out.
tho by your description it looks almost finished. The last 2 weeks they really fatten up.
I really hate these things, eating there way through the buds while leaving a trail of shit.
It sucks going out to check the plants thinking, "how much am I going to cut off this time?"