between 2 and 4 days before harvest? for a balanced high and body effect

Greetings! 1) Nice looking bud there - had a similar girl. That's basically a sun tan on those leaves - turning them reddish. I think that's mostly in the genetics - along with perhaps a tad too much light power. 2) From those trichomes - I see a good 50/50 clear/cloudy ... even though you see a random amber trike, I wouldn't worry. In my case, I saw very similar images at that stage ... I kept waiting, watching the trichomes daily ... they took fooooorever to turn to a good 80/15/5 (cloudy/clear/amber) ... and in that time, the buds swelled so much - I can guarantee you that I double the harvest yield by waiting (was about 3 weeks from what I see in your pics). Anywhooo ... just my 2 cents. I'd wait at least a week - then give it another week for kicks. You'll gain so much weight in that time :) Best of luck!