I don't go by trichomes. I go by hairs. If 80% have turned, it's time. That amber, white, cloudy sh@t is retarded. If your turning amber, then you know as you dry it and cure it more are degrading. I'll cut mine down when 80% of the hairs have turned. That way, by the time it's dried and cured, I'm getting peak potency. If you harvest when they are going amber, remember more will go amber after you cut em down. Just cause you cut them down, doesn't mean they are not still maturing. They'll stop maturing when all water is gone. Just look at a rose, you cut it but it still growing and maturing. It will till it dies. Same with cannabis. Just cause you cut it doesn't mean all cellular growth stops at that exact moment. It still aging. If you want to go by trichomes, I harvest at 80% milky. That way after all is said and done, I'm just starting to turn amber when dried. Why in the f@ck are you gonna wait till your sh@t starts losing potency? It makes absolutely no sense. I harvest at peak. THC loss is minimal. 80% milky and you can't do wrong....just my opinion.