It could just be me but those look predominantly sativa. If that's the case I would let it bulk up quite a bit before I chop. If that's seven weeks then you either have a couple more weeks to go, or this plant is going to take a while longer to finish. How are the trich's looking?
And the seven weeks, was that from your first sign of flowering, or from when you switched the lights? I'm asking this because I'm still flowering a bbxnl mother even though i harvested two other plants three weeks ago (that were all put into flowering the same day and stage of growth), and I think I'm going to let her go another week or so, the buds are starting to turn a beautiful shade of indigo that I would've never seen had I harvested any earlier. Your genetics full potential come out in the last two weeks of flowering; If I were you I'd start flushing and harvest when they're perfect and use up as much of the nutes as possible.
Good luck and take it easy!