whoa there...
most everyone uses the 75% of the hairs turning and others watch trichomes to turn with no more than 10% of the trich's being amber (then a minority uses the dates given by the breeder). please watch what you tell others and if you don't know say nothing. waiting as long as you say would mean adding another month onto the flowering time and the plants will definitely degrade long before one would get around to picking them...