hey fellow grower. I guess the best tip is to follow your instinct, because you are right at least 2 weeks more, maybe 3. But to stop guessing check trichomes(60-100x zoom) and check buds not leaves or sugar leaves, usually first harvest is considered if everything is more or less milky.. but you will get head high mostly... then if you wait a bit more and you get 10-20% amber and the rest is milky... then harvest for the best combo head/body high... if you will wait even more you will get lots of amber, then you will get mostly a downer body stone... whatever you prefer... and nothing happens in an hour, so you actually have days to decide to chop her or not, when it looks good to you... good luck and best harvest 👍