Looks like your window is approaching soon. In photo 8, it looks like she is still stacking on weight with fresh thick pistils. I would highly recommend going on line and buying a 30x or greater loupe, either regular or digital. Decent ones can be found on Amazon for $10 usd. From what I see, you should have time. If you are wanting more of a head high, start your flush when the plant is predominantly cloudy and also with clear trichs but very little to no ambers, then at the end of the 7 to 14 day flush it will be a mostly cloudy trich plant which should be peak thc.
Every grower should have an ec meter, pH meter, and loupe in their tool bag.