i have experimented wit this and fan leaves can comfortably be removed after stretch is over -first 1/3 of flower
sum plants discard after 2/3 of fllower
never remove leaves sticking from buds
or small fans from and below buds that frost over
fans on stem are not needed for buddage just for growth and supply the regon they are growing from -a fan on a stem suppys energy for d=stem and so on