I think there's a bit of debate about the effects of trimming your fan leaves and other branches to plant health (especially during flowering). All i can say about that is that in my experience, it has never caused me any real problems just don't go overboard. I try and avoid trimming very healthy leaves though.
One very useful way to deal with that situation without trimming is to tie down certain branches that are covering other new growth areas. This is a hugely effective way of providing maximum light to as much of the plant as possible and is especially beneficial when the plant is young.[/QUOTE]