should I flush

If you're intent on flushing then I would wait at least 10 more days or until about 25% of the hairs are red. New scientific study has shown, however, that flushing doesn't actually do anything and could hurt the potency. Almost every grower will disagree with this, I understand I'm in the minority, but I agree with the science. A blind taste test also showed that people actually preferred the taste of unflushed bud. Another study showed no difference in the ash or harshness of the bud. Make your own choice of course.