only time I would suggest cutting off fan leaves, when your in very late flower example when you start to flush, 2 weeks before harvest, I cut every fan leaf off, so I can get some extra light to the bottom of the plant to the small buds, that never get big, why, because I can harvest the very small buds as well, on the bottom, with out cutting off a few leaves. the bottom buds , never get the light and wont get sugar looking. only do this if you have every thing dialed in, no problems with the plant,