What's your goal with the ties, pulling the stalks together at the center? Looks like for the Bhut White its keeping them oriented vertically into the light.
Yep, I find when I top older plants the new growth branches will spread farther laterally, which I don't want them to do in this scenario. So, I top them, let them start to grow out, then I clear out some leaves in the center for air circulation and train them less outward more upward. Instead of a tall sparser plant or a short wide bushy plant, my goal is a shorter plant with multiple equal growth stems, smaller leaves, and good air circulation. Plus I don't expect to have room for these under my HID's and the CFL should penetrate them better with that growth profile.
Hey, didn't I see you post you were growing Bonda Malhala? How are you finding it and do you know which phenotype you have? Mine seemed pretty average for a while, but now it looks like it might be getting ready to beast.