Question about Flushing.

I have read many posts and a few books, so at this point, I know I'll want to harvest when my trichs are cloudy, with just 5-10% amber. My question is, if I want to cut then, when do I start flushing? My girls are in Week 9 and right now trichs are mostly clear, maybe about 25% are cloudy. I was thinking of starting my flush on Wednesday, lights off for 72 hours on Friday. I know pics would help, and I'll take some when I go turn my lights. Also, I read fdd2blk's harvest guide and the main colas definitely look ready, but like I said when I use my scope, only 25% of trichs are cloudy, the rest still clear. My plants are a Kandy Kush, which takes 8-10 weeks Nd 3 Chocolate Rains which ate supposed to take 9-10 weeks.
Any help would be really appreciated! Thanks!

i wouuld start flushiung now man, if they are 25% cloudy and u are 9 weeks in flowering.

That's pretty much what I was thinking, but I just wanted some opinions from more experienced growers! Thanks. + rep