By looking at the pictures you've got at least another two weeks to go.
The fact that you've still got white pistils coming straight out of the buds and they have not curled in yet tells you this. Take note, (Some strains vary). Second, 80% Pistil hair colour should have turned a brown/red colour. I see quiet a few white ones.
Now to get technical, you need a magnifying glass of some kind.. jewellers loupe with x30 scope works well, the stronger the better to a degree. But anyway, checking the trichomes you want most cloudy/milky with some amber for best result. (80% cloudy to 20% amber trichomes is what most people look for). Again this varies slightly depending on the high you're after. Always good to double check your information source and do some of your own research along side what other people say.
Before I forget, if you have not already started the flush.. I'd start now for 10-14 days.
Its just advice, do whatever you want to do ;) Hope this helps!
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