Time to flush my AK-47?? HELP please... (pics)

Please look at one of my plants and advise me on when I should begin flushing. I want to begin flushing 2 week prior to harvest. About 30% of the hairs are brown/reddish and I am only 40 days into flowering.

About set up:
- under a 400 watt HPS
- AK-47 flowering for 40 days
- Advance nutrients three part fertilizer (1600 ppm)
- Occasionally add molasses
- 1.5 gallon pots
- Temp. is approx. 82 with lights on and 70 when off


I would greatly appreciate your reply, my first grow. Peace

start now my ak usually finishes 55\60 days,you should veg longer next time

Okay, I will start them on distilled water. I am a little disappointed with the size of the nugs so far, will the nugs get very much bigger in the last two weeks? Thanks

From those pictures I don't really see many crystals(trichs), I wouldn't flush yet, are they serious seeds? Keep the nutes up for a little longer.

They are good seeds. (from Dr. Chronic)

start flushing at day 50. those nugs will fill up more, dont worry