I am happy to hear that you are still enjoying growing my work and the sample brother!
Let me preface this by saying, obviously whenever you feel that the plants or you are ready to harvest, that is entirely up to you. With that being said, my Yeti OG cut that I used to make that hybrid, I always took right around 10 weeks, give or take a couple of days. I do prefer my medicine to be a little more well done than some people might though.
The Tropicanna Cookies F2s that I found the stud used in the hybrid, all of the females took around 9-10 weeks (usually right around 65 days was the sweet spot). I am not entirely sure from your pictures, but it doesn't seem that your Yeti OG x Tropicanna Cookies lady is showing any purple and it appears to have the Yeti OG stature, so you might have a lady that leans more to the Yeti OG side of the hybrid (The first one that I have seen out of everyone who has flowered this hybrid). Every male and female that I ran of the Tropicanna Cookies F2 had some purple, whether or was lightly or full blown coverage, regardless of temperature. Again, please definitely feel free to harvest your medicine whenever you see fit. I just wanted to give you the information about the parents of the hybrid to do what you will with it.
Thank you again for giving my work a spot in your garden. Please feel free to reach out if you are interested in running any of my other hybrids. I appreciate you! Positive vibes...
~nugzz