DOn't check trichomes on the leaves to start with. They mature faster because they are more exposed. From that picture it looks like about 2 weeks still. I just chopped one of my C99 crosses that other night
. Has it completed 7 weeks or is it starting the 7th week? Also are you counting from when you flipped the lights or from when it actually began to form flowers. Different plants take different amounts of time to transition from veg into flower. So flowering time actually begins when flowers start to form, not from 12/12 switch. Now it doesn't matter when you count from, but you have to understand the biology of the plant. M
y C99 plants typically took about 65 days from first flowers.
First breeder times are notoriously inaccurate because everyones gardens are different. But if a breeder says flowering time he means from first flowers. Some breeders will actually list 12/12 time which is different.
You DO NOT want to chop early it will decrease quality and yield!
Let the stigma(pistils) finish turning red and actually start to receed back towards the buds. Then the bracts(calyx) will begin to swell internally, and start to look plump. That is when to check the trichomes and decide if the plant looks ripe.
It is VERY easy to harvest too early, it is VERY hard to harvest too late. In 14 years of growing I've never seen someone accidentally over ripen a plant. It would take weeks of ignoring them for that to happen.