I think you might be looking at the wrong "Hairs" when people are talking about the color of the trichs or trichromes we are talking about the crystals of THC on the buds not the pistols that are shriviling up and dying. This is a very common mistake, as I stated in another thread I harvested my first two grows waaay to early because I didn't know what I was looking for.
The only way to see the color of the Trichromes are to get a jewlers loupe or a handheld microscope
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Your plants look AMAZING and I would hate to see them not reach there full potential. You want to start your flush when you start to see the Amber trich heads. I know that the seedbank sites say 60 or 70 days from seed to harvest but from what I have seen those estimates are most of the times not enough for the plant to fully develop. Just my thoughts though, others may have different thoughts or ideas. Again great job the ladies look wonderful and happy