I was told to just let em grow, don't chop on auto's. They have a life cycle that is short and the clones will follow that cycle like they are still attached to the mother. In other words, taking clones is pointless. They will continue on like they are part of the mother. Flowering when the mother does and everything. So it's pointless to chop her. That's what I understand anyway, Don't set it in stone though.