I'd top around the 4th or 6th node. After that I'd low stress train the plant. This will give you 8-12 big main colas (2 tops for every node below where you top, but the more colas the smaller each will be or the longer you have to veg. 6 nodes produced this plant(nov 27th). 2nd pic is what it looked like the day it was topped (oct 13th)