I'm growing one right now. It's been in flower about 3 weeks and right now is the rockstar of the tent in terms of the number of bud sites and growth. I didn't top mine, just did some LST that bordered on HST. It's growing faster than the other autos so I bent the top down and in 24 hours it flipped up and kept right on growing. Now I'm glad I didn't top it, I would just train enough to keep a level canopy and defoliate enough that all the bud sites are getting light. HTH.