Don't use the trichomes on the fan leaves or even the sugar leaves to determine if its done. Those can go amber way way early.
Watch the buds. When it stops throwing white hairs (most strains.....some can just keep throwing new pistils forever) you are getting close. Plus you need to know that most size (i.e. weight) comes on in the last couple weeks. If you harvest this early, you are probably going to lose a large chunk of that weight we crave from our girls. Let those hairs turn a different color. Let the plant tell you that she is done. She will let you know if you pay attention.
