Basically right George!
I have the impression that all the three models Genealogical Adam (@Swamidass), Homo divinus (@Kathryn_Applegate), and Transmission at generation (my model) share the following assumption:
After the first transgression in history humans are bounded in Need of Redemption or “state of Original Sin” not only because of their own personal transgressions but also because “Adam’s sin became our sin” (@Kathryn_Applegate, article).
Additionally, all these three models fit with the available scientific data.
In my view this is an important result of this Blog and it may be worth comparing more in detail the three models in coming posts to ascertain where they deviate from each other, and whether or not such differences are relevant for the faith in Redemption by Jesus Christ.