Yup, three brains plus a mind. Then there is a fifth element known as the True Self which is what observes and operates the three brains and a mind. I’m not at all surprised you’re a heart-thinker. It shows in your writing.

The solar plexus is where we receive feeling-tone vibrations. The noggin brain is where we apply cognitive reasoning and emotions to the vibrations. The heart is where we generate feeling-tone vibrations. The mind is what coordinates the three brains. The True Self is what we have lost touch with because we are so stuck in the thinking and emotions of the noggin brain.