I'd give them at least 2 weeks as well. But I'm not so sure I agree about trichome color ratios like most people. I have 3 week 10 flower bagseed plants and they are all quite cloudy (75% at least) and no trace of any amber anywhere, one plant looks like it is actually done, the other 2 look like they have a few weeks left. Unless you are worried about getting too many amber trichomes, harvest in 2 or 3 weeks when the bud as a whole actually looks like its done (pistils will darken and recede into the bud, colas will look like they are done)