Will you guys stop spreading the misinformation about amber trichs. Amber means your shit is DEGRADING, not getting better or producing more of a couch lock high. You can't make a sativa an indica just by letting the trichs degrade.
Now, that being said, when I look for the right time to harvest is when I first start seeing amber trichs, couple percent not 20, or 50 or 60, if it were bannas you'd be harvesting mushy black skinned bannans. This tells me that it's probably time to chop or was a day or two ago because I have pushed the production of cloudy trichs as far as I could go and am now cresting the other side where things will start to go downhill, so thats when I bail.
I have a kush that will couch lock your ass by day 30 into flower with not a single amber trich in sight, because it has nothing to do with amber trichs.