Just to make it clear what you're looking at.
The first picture is the roots.
The second picture is the first cut I made to widen the original opening. You can see that the tissue there is healthy.
The third picture shows the inside (hard to see) prior to any additional clean out. You can see some additional rot and how dark and damp it is.
The fourth picture shows how you can see through the whole caudex after I opened it up on both sides for the airflow.
The fifth picture is the new opening I made and the inside form that perspective.