I am a die hard SCROG grower and I also believe in the removal of large fan leaves. The most efficient growth on a plant comes from the smaller, new leaves. I consistently remove all large fan leaves that shade any actual buds. And when i say I remove them, I cut them off with abandon. I am always after 10+ ounces per plant and have found that the only way to do this every time is to remove the Larger fan leaves and allow light penetration directly to the buds. I am solely after efficency and understand why one would leave the large fan leaves otherwise. I have found them to be more of a problem then a solution in scrogging. I know this is in direct contrast to the standard rules of growing outside but, inside, in a SCROG, it works, and it works much better then leaving them on the plant. Just speaking from what i have seen and experienced though. It is possible that i am doing something wrong elsewhere that causes this phenomenon.