Yes you can harvest the orbitting colas and leave the main one growing and yes it will stay alive... But you may shock her and stunt much future growth, trichs are hard to determine harvest time with autos, I aim for the couch lock and my last grow finished with 5% Amber... Wait for the leaves to start dying off when most the fan leaves have died off then it should be a more energetic high, waiting until the bud leaves yellow I find gives me the couch lock...plus in the little extra time she could put on a lot of weight...
Healthy looking plant tho dude :gthumb: