Hey,
So these will usually finish in about 7-9 weeks from beginning to end. Your pistils are starting to discolor and curl, so you might be looking at like 2 weeks more. Id go in and do a defoliation on it and get some of the crowded leaves out and that might help it bulk up some and free up light penetration. Probably only feed it for a week more before just plain water(unless you're growing in living soil or similar organic method). Then just keep an eye on those pistils being about 80% colored and curled and then try grabbing some close ups with the flash to get trichrome photos, and use a loupe too if you have one.
*autos can finish real quick all of a sudden so keep a close eye on progress every day.
Happy harvesting. ✌️