Ya I know what you mean about those side branches. I have my 400w maybe 20-25" away just so they can get a good stretch. Im working with indicas and sativas. Im prepared to super crop the sativas though since they can get alot taller then indicas. I wouldnt worry right now since you still are vegging for 3 more weeks. I say when 6 weeks is up then start planning on removing or cutting on half the fan leaves. Heres what mine look like