She looks healthy. Some burned tips makes me think about a light nutrients burn. Be patient , will come the moment when she will be in a rush and will start to really getting fat but if you are targeting to harvest thanks to the breeder recommendations I recommend you to add one more week to the countdown

From what I can see, it looks healthy. Where there any deficiencies or problems in early flower that could have slowed growth? I think as well, most of the time, the recommended flowering time is only for plants which have been kept in an ideal climate their entire lives. Maybe you have longer to go in flower than you think. Just keep an eye on the trichomes.