I would definately start flushing. Your end result will taste better with a weeks worth of flush and two weeks wouldnt hurt if they are still maturing. As far as the microscope, 20x or 60x... they got them at your local plant shop or some on ebay..bout 8- 10 bucks. But w/o the micro., u should see about 75% amber... you look like your at about 40-50 now...if your buds dont get any bigger, chop after week...if u still see progression, wait another.