The Phototron has a technique of trimming in veg to get the most budding sites on the plant.

Top the plant at 6 to 8 sets of branches.

When a side branch has one set of leaves cut the leaf off at the main stem for that branch and top that branch. This encourages the branch to grow.

Now on every branch after the ones coming off the main stem. Top those secondary branch at two sets of leaves and trim the leaf at that branch.

This will give you a bush from hell. You can take it as far as you want in veg. I have seen a plant only 3 feet tall have 5 pounds under one 1000 hps light. It was also 3 feet wide.