Once the core is removed you need to make three marks on it. You will need to mark 2 slab cuts from the curved front of the core and one slab cut from the rear of the core. The outermost slab taken from the rounded front of the core will later become both the drawer pull and the frame surrounding the drawer pull. The second slab taken from the front of the core will become the wall of the storage space you will create later. The rear slab will become the back of the storage area.
Cut the two front slabs off the core and set them aside. DO NOT cut the rear slab at this time.