I need an opinion regarding an ETA for harvest day...

Pistils indicate flower maturity, not trichome maturity, a good lens, at least 8x or 10x and watch those trichs. I go for 20% Amber personally, but I also favor indicas, sativas I go for more 35%. I like the heavier, yet still heady buzz.. THC peaks at cloudiness, and slowly begins converting to other compounds when the caps flatten or shrivel, and they turn Amber... After this point the only gains are mass, the buds continue to fatten, but potency will decline relatively.. so if potency is your goal over yields, then max cloudy on the side of Amber is what to watch for.. and over the whole plant, don't forget to check the mid and lower buds too and take an estimated average.. lower finish a bit later... Cheers! Keep it Green!

First of all your buds look amazing, you must be very proud! 👍I think you've got it bang on, I would start a flush as soon as you're happy with the cloudyness of trichomes, and then harvest when some Amber appear, remember to look at the bud trichs and not the leaves! 🌱😁