Those fan leaves are also the factories that synthesize all the good things the plants need to grow giant buds. A majority of photosynthesis takes place in the leaves, and photosynthesis is the main driving force in plants growing big and potent flowers. So removing the largest fan leaves is like removing the largest power plants driving the plant. The trick is to remove anything that cannot get light past those fan leaves.
Holy cow tipper, that one plant has seriously blown up. I bet she drank more water than any of your other girls. Things are looking good in there. Get those cages set, your plants are about to start packing on weight.