Any help with flush and timeing

Hi im pretty new to this i ask for everyone opinions the last time and everything came out perfect so here goes. Im growing nyc diesel this time. Im at week 8 my buds seems to be getting desnser and heaviery by the day. Most of the pistols are ambered already. It claims to be a 10 to 12 week stain… im growing in dwc with general hydroponics with advanced Nutrients bud candy. Im wondering how long before harvest i should start cutting the Nutrients back… heres some pics any opinions would be appreciated. And if i should let it go another 2 weeks… i have issues reading the tricomes…

Looking good I flush my last 2 weeks of flower with ph water only