1st week out of the veg tent, post 1st defoliation. I like to do all my major training in Veg to prevent further stress in flower.
I cut all lower fan leaves off and any unnecessary bud sights (ones that I know will not get any light) - Keep in mind these bitches STRETCH & grow massive fan leaves which block out almost all the light to lower sections of the plant. So you will have to remove leaves, how many is up to your preferred method.