Phenomenology - self-observation - thereby turns into an ontology of the self, and if you've done it correctly (I'm not saying this is easy), you have the beginning of a new ontology which by design accommodates the manifest realities of consciousness... My way [of pursuing this program] is to emphasize the phenomenological unity of consciousness as indicating the ontological unity of the self...

Have you ever burned yourself on, say, a hot dish? Typically, people automatically recall such experiences in the following time sequence: simultaneous touch and burn sensation, followed by sharp involuntary withdrawal of limb. This time sequence is a trick our brains play on us: the withdrawal reflex arc is entirely spinal; withdrawal of the limb happens before the damage signal even has time to reach the brain. (After becoming aware of this fact, I had a burn experience in which I seemed to feel my brain trying to switch the time ordering of my perceptions from motion-prior-to-pain to pain-prior-to-motion and consciously intervened in the process to preserve my original perceptions.)

I bring this up because I believe that a brain capable of that trick cannot possibly give an accurate ontology of self through mere self-observation. You might be able to rescue your program by expanding the definition of self-observation to include the findings of modern neuroscience.