No Magnfying glass, WHEN DO I CHOP?

ok so i have a bagseeed grow and its been goin since september-ish, im really bad with time so i dont know what week flowering im in, and i forgot when i started. I know i should be more organized but its to late.

SO besides a scope and keeping track of time, how can i tell if my plant is ready to be chopped up?
I have heard of telling by the color of the hairs. something about them bein 75% orange?

you can either go buy a scope(they are like 10 bucks at radio shack) or you could pick off a couple small popcorn buds off the bottom and test them but i highly recommend the first. youll need it for other grows anyway.

also if you wanted to post some pics of the buds from various angles and distances im sure people could give you an estimated guess on how much longer

ok thanks ill check out that scope if its only ten, thought they were more. i got pics comin too.

when 75-80% of the hairs appear brownish.