This paper is a revision of my earlier suggestion (2006) that the form of NPs is determined after all the features are specified for the computation under the assumptions of Multiple Spheres Hypothesis. Adopting the DM-based notions of morphological shaping (Heinat 2006, Safir 2011), I develop the proposal, arguing that the choice between the ‘-self’ form and the pronominal form is determined after the computation of root NPs is accomplished by Free Merge operation in multiple Membranes (Im 2013).