Some parts of the plant can finish earlier than others. If you are going to do that I would recommend putting the plant on 48 hours of darkness first, then chop, then 24 hours of light, then another 48 of dark & chop the rest. I know it sounds funny but the stuff you have left after the chop will swell up more & create more thc. When I did that a few years ago with some purple indica it literally started oozing liquid thc that I harvested into a pale greenish white colored hash ball that sizzled & bubbled as it burned. Ohh yaa .... lol