Guys, he's confused what trich's are. Lets clarify it for him. The trich's are the "crystals", stickyness, glittery things or what ever you want to call them. 75-80% amber is quite high for alot of people's preference. I'd say a ratio of 60-40% which ever way you want. TRICH'S are the determining factor in harvesting NOT pistols (hairs). Some plants pistols turn brown early, late, right in time, some don't turn at all. If you can't tell how many cloudy/amber trichomes you have from just looking at it then you should get a magnifying glass or pocket microscope.

90 days into flower is not unheard of but, I'd def. check those trichomes. If you have a shit load of amber trichomes, harvest.