That foxtailing is bound to drive you crazy trying to figure out when it's ready. There's new growth coming in. If you need to wrap this grow up, pick an older calyx to watch, get a 60x up close look and when the trichomes start to turn to amber you are in a chop window. OR... if you're not in a hurry you can let it just keep growing. Unless the lighting is wonky, genetic foxtailing usually winds down, so the plant is just making more for you to smoke if you wait.
What he said. 6 weeks is a fast flower time. You have to go off the calyxes, sugar leaves mature faster then the buds. I would lean on error and go longer, usually if I have to ask them it's probably not ready lol. And you can tell your bud is still bulking