They also seem ready to me, but the reference shouldn't be the pistils but the trichomes. Get a microscope and check the resin; if you see them transparent, it's too early. If they're milky, it's almost okay, and if you see some darker ones, then it's the right time. If they're all dark, you can make some spectacular hashish. Anyway, start rinsing and rinse well because the plant is a bit over-nutrient, so it's better to rinse it, and you'll have more flavor. In soil, at least a week and a half, in your case, a minimum of 2 :)